55442904 has 32 divisors (see below), whose sum is σ = 151208640. Its totient is φ = 16800800.

The previous prime is 55442897. The next prime is 55442927. The reversal of 55442904 is 40924455.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104742 + ... + 105269.

It is an arithmetic number, because the mean of its divisors is an integer number (4725270).

Almost surely, 2^55442904 is an apocalyptic number.

It is an amenable number.

55442904 is an abundant number, since it is smaller than the sum of its proper divisors (95765736).

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

55442904 is a wasteful number, since it uses less digits than its factorization.

55442904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210031 (or 210027 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 55442904 is about 7445.9991941982. Note that the first 3 decimals coincide. The cubic root of 55442904 is about 381.3133319854.

It can be divided in two parts, 5544 and 2904, that added together give a palindrome (8448).

The spelling of 55442904 in words is "fifty-five million, four hundred forty-two thousand, nine hundred four".