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230579280 = 243252931093
BaseRepresentation
bin11011011111001…
…01110001010000
3121001212122022100
431233211301100
5433012014110
634514040400
75466614541
oct1557456120
9531778270
10230579280
11109179698
1265279100
1338a02b59
14228a24c8
1515399bc0
hexdbe5c50

230579280 has 120 divisors (see below), whose sum is σ = 777715848. Its totient is φ = 61221888.

The previous prime is 230579233. The next prime is 230579281. The reversal of 230579280 is 82975032.

It is a happy number.

230579280 is a `hidden beast` number, since 2 + 3 + 0 + 579 + 2 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 148060224 + 82519056 = 12168^2 + 9084^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230579281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210414 + ... + 211506.

Almost surely, 2230579280 is an apocalyptic number.

230579280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 230579280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388857924).

230579280 is an abundant number, since it is smaller than the sum of its proper divisors (547136568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230579280 is a wasteful number, since it uses less digits than its factorization.

230579280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405 (or 1396 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 230579280 is about 15184.8371739706. The cubic root of 230579280 is about 613.2065138969.

The spelling of 230579280 in words is "two hundred thirty million, five hundred seventy-nine thousand, two hundred eighty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 36 40 45 48 60 72 80 90 120 144 180 240 293 360 586 720 879 1093 1172 1465 1758 2186 2344 2637 2930 3279 3516 4372 4395 4688 5274 5465 5860 6558 7032 8744 8790 9837 10548 10930 11720 13116 13185 14064 16395 17488 17580 19674 21096 21860 23440 26232 26370 32790 35160 39348 42192 43720 49185 52464 52740 65580 70320 78696 87440 98370 105480 131160 157392 196740 210960 262320 320249 393480 640498 786960 960747 1280996 1601245 1921494 2561992 2882241 3202490 3842988 4803735 5123984 5764482 6404980 7685976 9607470 11528964 12809960 14411205 15371952 19214940 23057928 25619920 28822410 38429880 46115856 57644820 76859760 115289640 230579280