55428624 has 100 divisors (see below), whose sum is σ = 168945040. Its totient is φ = 17496000.

The previous prime is 55428623. The next prime is 55428767. The reversal of 55428624 is 42682455.

It is a happy number.

55428624 is a `hidden beast` number, since 5 + 5 + 4 + 28 + 624 = 666.

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 (55428623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23499 + ... + 25749.

Almost surely, 2^55428624 is an apocalyptic number.

55428624 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 55428624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84472520).

55428624 is an abundant number, since it is smaller than the sum of its proper divisors (113516416).

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

55428624 is a wasteful number, since it uses less digits than its factorization.

55428624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290 (or 2275 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 55428624 is about 7445.0402282325. The cubic root of 55428624 is about 381.2805918657.

The spelling of 55428624 in words is "fifty-five million, four hundred twenty-eight thousand, six hundred twenty-four".