72770438 has 32 divisors (see below), whose sum is σ = 126554400. Its totient is φ = 31080960.

The previous prime is 72770407. The next prime is 72770447. The reversal of 72770438 is 83407727.

It is a congruent number.

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, 25613 + ... + 28311.

It is an arithmetic number, because the mean of its divisors is an integer number (3954825).

Almost surely, 2^72770438 is an apocalyptic number.

72770438 is a deficient number, since it is larger than the sum of its proper divisors (53783962).

72770438 is a wasteful number, since it uses less digits than its factorization.

72770438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 72770438 is about 8530.5590672593. The cubic root of 72770438 is about 417.4953694492.

The spelling of 72770438 in words is "seventy-two million, seven hundred seventy thousand, four hundred thirty-eight".