68657072 has 20 divisors (see below), whose sum is σ = 145116456. Its totient is φ = 31207680.

The previous prime is 68657063. The next prime is 68657077. The reversal of 68657072 is 27075686.

It is a happy number.

It is a super-2 number, since 2×68657072² = 9427587071226368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68657077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194873 + ... + 195224.

Almost surely, 2^68657072 is an apocalyptic number.

It is an amenable number.

68657072 is an abundant number, since it is smaller than the sum of its proper divisors (76459384).

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

68657072 is a wasteful number, since it uses less digits than its factorization.

68657072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390116 (or 390110 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 68657072 is about 8285.9563117361. The cubic root of 68657072 is about 409.4759753791.

The spelling of 68657072 in words is "sixty-eight million, six hundred fifty-seven thousand, seventy-two".