72702765 has 40 divisors (see below), whose sum is σ = 131856120. Its totient is φ = 38320128.

The previous prime is 72702737. The next prime is 72702779. The reversal of 72702765 is 56720727.

It can be written as a sum of positive squares in 4 ways, for example, as 8398404 + 64304361 = 2898^2 + 8019^2 .

It is not a de Polignac number, because 72702765 - 2¹¹ = 72700717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35037 + ... + 37053.

It is an arithmetic number, because the mean of its divisors is an integer number (3296403).

Almost surely, 2^72702765 is an apocalyptic number.

It is an amenable number.

72702765 is a deficient number, since it is larger than the sum of its proper divisors (59153355).

72702765 is a wasteful number, since it uses less digits than its factorization.

72702765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 72702765 is about 8526.5916402746. The cubic root of 72702765 is about 417.3659124541.

The spelling of 72702765 in words is "seventy-two million, seven hundred two thousand, seven hundred sixty-five".