55288404 has 36 divisors (see below), whose sum is σ = 147114240. Its totient is φ = 17459280.

The previous prime is 55288399. The next prime is 55288417. The reversal of 55288404 is 40488255.

It is a tau number, because it is divible by the number of its divisors (36).

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39732 + ... + 41099.

Almost surely, 2^55288404 is an apocalyptic number.

It is an amenable number.

55288404 is an abundant number, since it is smaller than the sum of its proper divisors (91825836).

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

55288404 is a wasteful number, since it uses less digits than its factorization.

With its successor (55288405) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (80855).

55288404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80860 (or 80855 counting only the distinct ones).

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

The square root of 55288404 is about 7435.6172574979. The cubic root of 55288404 is about 380.9588067974.

The spelling of 55288404 in words is "fifty-five million, two hundred eighty-eight thousand, four hundred four".