72807645 has 16 divisors (see below), whose sum is σ = 118089792. Its totient is φ = 38298240.

The previous prime is 72807629. The next prime is 72807659. The reversal of 72807645 is 54670827.

It is not a de Polignac number, because 72807645 - 2⁴ = 72807629 is a prime.

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, 32151 + ... + 34340.

It is an arithmetic number, because the mean of its divisors is an integer number (7380612).

Almost surely, 2^72807645 is an apocalyptic number.

It is an amenable number.

72807645 is a deficient number, since it is larger than the sum of its proper divisors (45282147).

72807645 is a wasteful number, since it uses less digits than its factorization.

72807645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66572.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 72807645 is about 8532.7395952297. The cubic root of 72807645 is about 417.5665114493.

The spelling of 72807645 in words is "seventy-two million, eight hundred seven thousand, six hundred forty-five".