57086887 has 16 divisors (see below), whose sum is σ = 70600320. Its totient is φ = 45381600.

The previous prime is 57086879. The next prime is 57086923. The reversal of 57086887 is 78868075.

It is not a de Polignac number, because 57086887 - 2³ = 57086879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57086887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57086087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7789 + ... + 13222.

It is an arithmetic number, because the mean of its divisors is an integer number (4412520).

Almost surely, 2^57086887 is an apocalyptic number.

57086887 is a deficient number, since it is larger than the sum of its proper divisors (13513433).

57086887 is a wasteful number, since it uses less digits than its factorization.

57086887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21054.

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 57086887 is about 7555.5864762439. The cubic root of 57086887 is about 385.0455604709.

The spelling of 57086887 in words is "fifty-seven million, eighty-six thousand, eight hundred eighty-seven".