55438504 has 64 divisors (see below), whose sum is σ = 121305600. Its totient is φ = 23486400.

The previous prime is 55438501. The next prime is 55438511. The reversal of 55438504 is 40583455.

It is a self number, because there is not a number n which added to its sum of digits gives 55438504.

It is not an unprimeable number, because it can be changed into a prime (55438501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118479 + ... + 118945.

It is an arithmetic number, because the mean of its divisors is an integer number (1895400).

Almost surely, 2^55438504 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 55438504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60652800).

55438504 is an abundant number, since it is smaller than the sum of its proper divisors (65867096).

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

55438504 is a wasteful number, since it uses less digits than its factorization.

55438504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 55438504 is about 7445.7037276540. The cubic root of 55438504 is about 381.3032445926.

The spelling of 55438504 in words is "fifty-five million, four hundred thirty-eight thousand, five hundred four".