55872520 has 64 divisors (see below), whose sum is σ = 143130240. Its totient is φ = 19430400.

The previous prime is 55872517. The next prime is 55872563. The reversal of 55872520 is 2527855.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7360 + ... + 12880.

It is an arithmetic number, because the mean of its divisors is an integer number (2236410).

Almost surely, 2^55872520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55872520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71565120).

55872520 is an abundant number, since it is smaller than the sum of its proper divisors (87257720).

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

55872520 is a wasteful number, since it uses less digits than its factorization.

55872520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566 (or 5562 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 55872520 is about 7474.7923048069. The cubic root of 55872520 is about 382.2957059054.

The spelling of 55872520 in words is "fifty-five million, eight hundred seventy-two thousand, five hundred twenty".