57072765 has 16 divisors (see below), whose sum is σ = 92865600. Its totient is φ = 29922432.

The previous prime is 57072737. The next prime is 57072773. The reversal of 57072765 is 56727075.

It is not a de Polignac number, because 57072765 - 2¹⁰ = 57071741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31360 + ... + 33129.

It is an arithmetic number, because the mean of its divisors is an integer number (5804100).

Almost surely, 2^57072765 is an apocalyptic number.

It is an amenable number.

57072765 is a deficient number, since it is larger than the sum of its proper divisors (35792835).

57072765 is a wasteful number, since it uses less digits than its factorization.

57072765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64556.

The product of its (nonzero) digits is 102900, while the sum is 39.

The square root of 57072765 is about 7554.6518781477. The cubic root of 57072765 is about 385.0138073420.

The spelling of 57072765 in words is "fifty-seven million, seventy-two thousand, seven hundred sixty-five".