55904772 has 96 divisors (see below), whose sum is σ = 172247040. Its totient is φ = 13662720.

The previous prime is 55904747. The next prime is 55904803. The reversal of 55904772 is 27740955.

It is a self number, because there is not a number n which added to its sum of digits gives 55904772.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13929 + ... + 17487.

It is an arithmetic number, because the mean of its divisors is an integer number (1794240).

Almost surely, 2^55904772 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 55904772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86123520).

55904772 is an abundant number, since it is smaller than the sum of its proper divisors (116342268).

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

55904772 is a wasteful number, since it uses less digits than its factorization.

55904772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601 (or 3599 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 55904772 is about 7476.9493779215. The cubic root of 55904772 is about 382.3692508815.

The spelling of 55904772 in words is "fifty-five million, nine hundred four thousand, seven hundred seventy-two".