55628860 has 48 divisors (see below), whose sum is σ = 134253504. Its totient is φ = 18966528.

The previous prime is 55628857. The next prime is 55628861. The reversal of 55628860 is 6882655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55628861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26572 + ... + 28588.

It is an arithmetic number, because the mean of its divisors is an integer number (2796948).

Almost surely, 2^55628860 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 55628860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67126752).

55628860 is an abundant number, since it is smaller than the sum of its proper divisors (78624644).

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

55628860 is a wasteful number, since it uses less digits than its factorization.

55628860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 55628860 is about 7458.4757155869. The cubic root of 55628860 is about 381.7391657077.

The spelling of 55628860 in words is "fifty-five million, six hundred twenty-eight thousand, eight hundred sixty".