68857560 has 128 divisors (see below), whose sum is σ = 232128000. Its totient is φ = 18154368.

The previous prime is 68857559. The next prime is 68857597. The reversal of 68857560 is 6575886.

68857560 is a `hidden beast` number, since 6 + 8 + 85 + 7 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110931 + ... + 111549.

It is an arithmetic number, because the mean of its divisors is an integer number (1813500).

Almost surely, 2^68857560 is an apocalyptic number.

68857560 is a gapful number since it is divisible by the number (60) 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 68857560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116064000).

68857560 is an abundant number, since it is smaller than the sum of its proper divisors (163270440).

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

68857560 is a wasteful number, since it uses less digits than its factorization.

68857560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 68857560 is about 8298.0455530203. The cubic root of 68857560 is about 409.8741632462.

The spelling of 68857560 in words is "sixty-eight million, eight hundred fifty-seven thousand, five hundred sixty".