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72075080 = 23572113343
BaseRepresentation
bin1000100101111…
…00011101001000
312000121210102102
410102330131020
5121422400310
611052452532
71533425300
oct422743510
9160553372
1072075080
1137759090
122017a148
1311c1719c
149802600
1564da8a5
hex44bc748

72075080 has 96 divisors (see below), whose sum is σ = 205856640. Its totient is φ = 22458240.

The previous prime is 72075079. The next prime is 72075083. The reversal of 72075080 is 8057027.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (72075083) 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, 19889 + ... + 23231.

It is an arithmetic number, because the mean of its divisors is an integer number (2144340).

Almost surely, 272075080 is an apocalyptic number.

72075080 is a gapful number since it is divisible by the number (70) 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 72075080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102928320).

72075080 is an abundant number, since it is smaller than the sum of its proper divisors (133781560).

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

72075080 is a wasteful number, since it uses less digits than its factorization.

72075080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379 (or 3368 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 72075080 is about 8489.7043529207. The cubic root of 72075080 is about 416.1613187219.

The spelling of 72075080 in words is "seventy-two million, seventy-five thousand, eighty".

Divisors: 1 2 4 5 7 8 10 11 14 20 22 28 35 40 44 49 55 56 70 77 88 98 110 140 154 196 220 245 280 308 385 392 440 490 539 616 770 980 1078 1540 1960 2156 2695 3080 3343 4312 5390 6686 10780 13372 16715 21560 23401 26744 33430 36773 46802 66860 73546 93604 117005 133720 147092 163807 183865 187208 234010 257411 294184 327614 367730 468020 514822 655228 735460 819035 936040 1029644 1287055 1310456 1470920 1638070 1801877 2059288 2574110 3276140 3603754 5148220 6552280 7207508 9009385 10296440 14415016 18018770 36037540 72075080