72647370 has 24 divisors (see below), whose sum is σ = 188883396. Its totient is φ = 19372608.

The previous prime is 72647359. The next prime is 72647389. The reversal of 72647370 is 7374627.

72647370 is a `hidden beast` number, since 7 + 2 + 647 + 3 + 7 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63154809 + 9492561 = 7947^2 + 3081^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 403507 + ... + 403686.

Almost surely, 2^72647370 is an apocalyptic number.

72647370 is an abundant number, since it is smaller than the sum of its proper divisors (116236026).

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

72647370 is a wasteful number, since it uses less digits than its factorization.

72647370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807206 (or 807203 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 36.

The square root of 72647370 is about 8523.3426541469. The cubic root of 72647370 is about 417.2598832029.

The spelling of 72647370 in words is "seventy-two million, six hundred forty-seven thousand, three hundred seventy".