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68790488 = 231319311123
BaseRepresentation
bin1000001100110…
…10100011011000
311210102220210212
410012122203120
5120102243423
610454230252
71463465234
oct406324330
9153386725
1068790488
1135915348
121b055388
1311337140
1491c95c4
15608c578
hex419a8d8

68790488 has 64 divisors (see below), whose sum is σ = 151065600. Its totient is φ = 29082240.

The previous prime is 68790481. The next prime is 68790499. The reversal of 68790488 is 88409786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68790481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60695 + ... + 61817.

It is an arithmetic number, because the mean of its divisors is an integer number (2360400).

Almost surely, 268790488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68790488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75532800).

68790488 is an abundant number, since it is smaller than the sum of its proper divisors (82275112).

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

68790488 is a wasteful number, since it uses less digits than its factorization.

68790488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 68790488 is about 8294.0031347956. The cubic root of 68790488 is about 409.7410381361.

The spelling of 68790488 in words is "sixty-eight million, seven hundred ninety thousand, four hundred eighty-eight".

Divisors: 1 2 4 8 13 19 26 31 38 52 62 76 104 124 152 247 248 403 494 589 806 988 1123 1178 1612 1976 2246 2356 3224 4492 4712 7657 8984 14599 15314 21337 29198 30628 34813 42674 58396 61256 69626 85348 116792 139252 170696 277381 278504 452569 554762 661447 905138 1109524 1322894 1810276 2219048 2645788 3620552 5291576 8598811 17197622 34395244 68790488