57087187 has 12 divisors (see below), whose sum is σ = 59783416. Its totient is φ = 54482400.

The previous prime is 57087169. The next prime is 57087197. The reversal of 57087187 is 78178075.

It is a happy number.

It is not a de Polignac number, because 57087187 - 2¹⁵ = 57054419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (57087157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94687 + ... + 95287.

Almost surely, 2^57087187 is an apocalyptic number.

57087187 is a deficient number, since it is larger than the sum of its proper divisors (2696229).

57087187 is an equidigital number, since it uses as much as digits as its factorization.

57087187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 43.

The square root of 57087187 is about 7555.6063290778. The cubic root of 57087187 is about 385.0462349601.

The spelling of 57087187 in words is "fifty-seven million, eighty-seven thousand, one hundred eighty-seven".