55288860 has 96 divisors (see below), whose sum is σ = 177811200. Its totient is φ = 12695040.

The previous prime is 55288829. The next prime is 55288867. The reversal of 55288860 is 6888255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55288867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10336 + ... + 14744.

It is an arithmetic number, because the mean of its divisors is an integer number (1852200).

Almost surely, 2^55288860 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 55288860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88905600).

55288860 is an abundant number, since it is smaller than the sum of its proper divisors (122522340).

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

55288860 is a wasteful number, since it uses less digits than its factorization.

55288860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451 (or 4449 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 55288860 is about 7435.6479206590. The cubic root of 55288860 is about 380.9598541342.

The spelling of 55288860 in words is "fifty-five million, two hundred eighty-eight thousand, eight hundred sixty".