55189824 has 56 divisors (see below), whose sum is σ = 146791680. Its totient is φ = 18299904.

The previous prime is 55189819. The next prime is 55189847. The reversal of 55189824 is 42898155.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42172 + ... + 43460.

It is an arithmetic number, because the mean of its divisors is an integer number (2621280).

Almost surely, 2^55189824 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 55189824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73395840).

55189824 is an abundant number, since it is smaller than the sum of its proper divisors (91601856).

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

55189824 is a wasteful number, since it uses less digits than its factorization.

55189824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527 (or 1517 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 55189824 is about 7428.9853950590. The cubic root of 55189824 is about 380.7322537958.

The spelling of 55189824 in words is "fifty-five million, one hundred eighty-nine thousand, eight hundred twenty-four".