68637968 has 80 divisors (see below), whose sum is σ = 160275456. Its totient is φ = 27855360.

The previous prime is 68637953. The next prime is 68637973. The reversal of 68637968 is 86973686.

It is a super-2 number, since 2×68637968² = 9422341302338048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183830 + ... + 184202.

Almost surely, 2^68637968 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 68637968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80137728).

68637968 is an abundant number, since it is smaller than the sum of its proper divisors (91637488).

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

68637968 is a wasteful number, since it uses less digits than its factorization.

68637968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 466 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The square root of 68637968 is about 8284.8034376200. The cubic root of 68637968 is about 409.4379926218.

The spelling of 68637968 in words is "sixty-eight million, six hundred thirty-seven thousand, nine hundred sixty-eight".