55087860 has 24 divisors (see below), whose sum is σ = 154246176. Its totient is φ = 14690080.

The previous prime is 55087841. The next prime is 55087873. The reversal of 55087860 is 6878055.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459006 + ... + 459125.

It is an arithmetic number, because the mean of its divisors is an integer number (6426924).

Almost surely, 2^55087860 is an apocalyptic number.

It is an amenable number.

55087860 is an abundant number, since it is smaller than the sum of its proper divisors (99158316).

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

55087860 is a wasteful number, since it uses less digits than its factorization.

55087860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918143 (or 918141 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 55087860 is about 7422.1196433364. The cubic root of 55087860 is about 380.4976397993.

It can be divided in two parts, 550 and 87860, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 55087860 in words is "fifty-five million, eighty-seven thousand, eight hundred sixty".