55057288 has 128 divisors (see below), whose sum is σ = 136080000. Its totient is φ = 20459520.

The previous prime is 55057273. The next prime is 55057309. The reversal of 55057288 is 88275055.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55057288.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369438 + ... + 369586.

It is an arithmetic number, because the mean of its divisors is an integer number (1063125).

Almost surely, 2^55057288 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 55057288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68040000).

55057288 is an abundant number, since it is smaller than the sum of its proper divisors (81022712).

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

55057288 is a wasteful number, since it uses less digits than its factorization.

55057288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 55057288 is about 7420.0598380337. The cubic root of 55057288 is about 380.4272387683.

The spelling of 55057288 in words is "fifty-five million, fifty-seven thousand, two hundred eighty-eight".