55904904 has 240 divisors, whose sum is σ = 185391360. Its totient is φ = 15681600.

The previous prime is 55904887. The next prime is 55904909. The reversal of 55904904 is 40940955.

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

It is not an unprimeable number, because it can be changed into a prime (55904909) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1803369 + ... + 1803399.

It is an arithmetic number, because the mean of its divisors is an integer number (772464).

Almost surely, 2^55904904 is an apocalyptic number.

55904904 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55904904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92695680).

55904904 is an abundant number, since it is smaller than the sum of its proper divisors (129486456).

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

55904904 is a wasteful number, since it uses less digits than its factorization.

55904904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55904904 is about 7476.9582050457. The cubic root of 55904904 is about 382.3695518260.

The spelling of 55904904 in words is "fifty-five million, nine hundred four thousand, nine hundred four".