55504188 has 18 divisors (see below), whose sum is σ = 140302344. Its totient is φ = 18501384.

The previous prime is 55504151. The next prime is 55504199. The reversal of 55504188 is 88140555.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1541783 = 55504188 / (5 + 5 + 5 + 0 + 4 + 1 + 8 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 770856 + ... + 770927.

Almost surely, 2^55504188 is an apocalyptic number.

It is an amenable number.

55504188 is an abundant number, since it is smaller than the sum of its proper divisors (84798156).

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

55504188 is a wasteful number, since it uses less digits than its factorization.

55504188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541793 (or 1541788 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 55504188 is about 7450.1132877293. The cubic root of 55504188 is about 381.4537755752.

The spelling of 55504188 in words is "fifty-five million, five hundred four thousand, one hundred eighty-eight".