55870 has 16 divisors (see below), whose sum is σ = 103968. Its totient is φ = 21600.

The previous prime is 55849. The next prime is 55871. The reversal of 55870 is 7855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55871) by changing a digit.

55870 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295 + ... + 445.

It is an arithmetic number, because the mean of its divisors is an integer number (6498).

2⁵⁵⁸⁷⁰ is an apocalyptic number.

55870 is a deficient number, since it is larger than the sum of its proper divisors (48098).

55870 is a wasteful number, since it uses less digits than its factorization.

55870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 55870 is about 236.3683565962. The cubic root of 55870 is about 38.2289958300.

It can be divided in two parts, 558 and 70, that multiplied together give a triangular number (39060 = T₂₇₉).

The spelling of 55870 in words is "fifty-five thousand, eight hundred seventy".