72640074 has 32 divisors (see below), whose sum is σ = 157094784. Its totient is φ = 22259520.

The previous prime is 72640019. The next prime is 72640091. The reversal of 72640074 is 47004627.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18744 + ... + 22284.

It is an arithmetic number, because the mean of its divisors is an integer number (4909212).

Almost surely, 2^72640074 is an apocalyptic number.

72640074 is an abundant number, since it is smaller than the sum of its proper divisors (84454710).

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

72640074 is a wasteful number, since it uses less digits than its factorization.

72640074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 72640074 is about 8522.9146423040. The cubic root of 72640074 is about 417.2459142181.

It can be divided in two parts, 72 and 640074, that added together give a triangular number (640146 = T₁₁₃₁).

The spelling of 72640074 in words is "seventy-two million, six hundred forty thousand, seventy-four".