57918865 has 4 divisors (see below), whose sum is σ = 69502644. Its totient is φ = 46335088.

The previous prime is 57918863. The next prime is 57918869. The reversal of 57918865 is 56881975.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45535504 + 12383361 = 6748^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 57918865 - 2¹ = 57918863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57918863) 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, 5791882 + ... + 5791891.

It is an arithmetic number, because the mean of its divisors is an integer number (17375661).

Almost surely, 2^57918865 is an apocalyptic number.

It is an amenable number.

57918865 is a deficient number, since it is larger than the sum of its proper divisors (11583779).

57918865 is a wasteful number, since it uses less digits than its factorization.

57918865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11583778.

The product of its digits is 604800, while the sum is 49.

The square root of 57918865 is about 7610.4444679664. Note that the first 4 decimals coincide. The cubic root of 57918865 is about 386.9070835249.

The spelling of 57918865 in words is "fifty-seven million, nine hundred eighteen thousand, eight hundred sixty-five".