55552428 has 72 divisors (see below), whose sum is σ = 148868720. Its totient is φ = 17418240.

The previous prime is 55552421. The next prime is 55552439. The reversal of 55552428 is 82425555.

It is a happy number.

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 = 55552392 and 55552401.

It is not an unprimeable number, because it can be changed into a prime (55552421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164676 + ... + 165012.

Almost surely, 2^55552428 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 55552428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74434360).

55552428 is an abundant number, since it is smaller than the sum of its proper divisors (93316292).

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

55552428 is a wasteful number, since it uses less digits than its factorization.

55552428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 602 counting only the distinct ones).

The product of its digits is 80000, while the sum is 36.

The square root of 55552428 is about 7453.3501192417. The cubic root of 55552428 is about 381.5642537353.

The spelling of 55552428 in words is "fifty-five million, five hundred fifty-two thousand, four hundred twenty-eight".