57087870 has 64 divisors (see below), whose sum is σ = 165805056. Its totient is φ = 12280320.

The previous prime is 57087859. The next prime is 57087871. The reversal of 57087870 is 7878075.

It is a super-2 number, since 2×57087870² = 6518049802273800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57087871) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4426 + ... + 11565.

It is an arithmetic number, because the mean of its divisors is an integer number (2590704).

Almost surely, 2^57087870 is an apocalyptic number.

57087870 is an abundant number, since it is smaller than the sum of its proper divisors (108717186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57087870 is a wasteful number, since it uses less digits than its factorization.

57087870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16025.

The product of its (nonzero) digits is 109760, while the sum is 42.

The square root of 57087870 is about 7555.6515271683. The cubic root of 57087870 is about 385.0477705384.

The spelling of 57087870 in words is "fifty-seven million, eighty-seven thousand, eight hundred seventy".