72785456 has 20 divisors (see below), whose sum is σ = 141157632. Its totient is φ = 36357696.

The previous prime is 72785443. The next prime is 72785459. The reversal of 72785456 is 65458727.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72785459) 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, 25745 + ... + 28431.

Almost surely, 2^72785456 is an apocalyptic number.

It is an amenable number.

72785456 is a deficient number, since it is larger than the sum of its proper divisors (68372176).

72785456 is a wasteful number, since it uses less digits than its factorization.

72785456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388 (or 4382 counting only the distinct ones).

The product of its digits is 470400, while the sum is 44.

The square root of 72785456 is about 8531.4392689628. The cubic root of 72785456 is about 417.5240876776.

The spelling of 72785456 in words is "seventy-two million, seven hundred eighty-five thousand, four hundred fifty-six".