57072657 has 16 divisors (see below), whose sum is σ = 77250560. Its totient is φ = 37476432.

The previous prime is 57072649. The next prime is 57072731. The reversal of 57072657 is 75627075.

57072657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57072657 - 2³ = 57072649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57072607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61644 + ... + 62562.

It is an arithmetic number, because the mean of its divisors is an integer number (4828160).

Almost surely, 2^57072657 is an apocalyptic number.

It is an amenable number.

57072657 is a deficient number, since it is larger than the sum of its proper divisors (20177903).

57072657 is a wasteful number, since it uses less digits than its factorization.

57072657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

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

The square root of 57072657 is about 7554.6447302305. The cubic root of 57072657 is about 385.0135644853.

The spelling of 57072657 in words is "fifty-seven million, seventy-two thousand, six hundred fifty-seven".