55090944 has 54 divisors (see below), whose sum is σ = 158847416. Its totient is φ = 18362880.

The previous prime is 55090939. The next prime is 55090963. The reversal of 55090944 is 44909055.

It is a super-2 number, since 2×55090944² = 6070024221622272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 55090899 and 55090908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9652 + ... + 14259.

Almost surely, 2^55090944 is an apocalyptic number.

It is an amenable number.

55090944 is an abundant number, since it is smaller than the sum of its proper divisors (103756472).

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

55090944 is a wasteful number, since it uses less digits than its factorization.

55090944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23933 (or 23916 counting only the distinct ones).

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

The square root of 55090944 is about 7422.3273977911. The cubic root of 55090944 is about 380.5047401708.

Adding to 55090944 its reverse (44909055), we get a palindrome (99999999).

The spelling of 55090944 in words is "fifty-five million, ninety thousand, nine hundred forty-four".