72734418 has 24 divisors (see below), whose sum is σ = 164443968. Its totient is φ = 23190552.

The previous prime is 72734411. The next prime is 72734419. The reversal of 72734418 is 81443727.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72734411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87430 + ... + 88257.

It is an arithmetic number, because the mean of its divisors is an integer number (6851832).

Almost surely, 2^72734418 is an apocalyptic number.

72734418 is an abundant number, since it is smaller than the sum of its proper divisors (91709550).

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

72734418 is a wasteful number, since it uses less digits than its factorization.

72734418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175718 (or 175715 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 72734418 is about 8528.4475726829. The cubic root of 72734418 is about 417.4264739585.

The spelling of 72734418 in words is "seventy-two million, seven hundred thirty-four thousand, four hundred eighteen".