55404288 has 108 divisors (see below), whose sum is σ = 161823480. Its totient is φ = 18229248.

The previous prime is 55404227. The next prime is 55404313. The reversal of 55404288 is 88240455.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320170 + ... + 320342.

Almost surely, 2^55404288 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 55404288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80911740).

55404288 is an abundant number, since it is smaller than the sum of its proper divisors (106419192).

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

55404288 is a wasteful number, since it uses less digits than its factorization.

55404288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 55404288 is about 7443.4056721369. The cubic root of 55404288 is about 381.2247831391.

The spelling of 55404288 in words is "fifty-five million, four hundred four thousand, two hundred eighty-eight".