55651428 has 48 divisors (see below), whose sum is σ = 164895360. Its totient is φ = 15900192.

The previous prime is 55651423. The next prime is 55651429. The reversal of 55651428 is 82415655.

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 = 55651392 and 55651401.

It is not an unprimeable number, because it can be changed into a prime (55651423) 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 15 ways as a sum of consecutive naturals, for example, 36051 + ... + 37562.

It is an arithmetic number, because the mean of its divisors is an integer number (3435320).

Almost surely, 2^55651428 is an apocalyptic number.

It is an amenable number.

55651428 is an abundant number, since it is smaller than the sum of its proper divisors (109243932).

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

55651428 is a wasteful number, since it uses less digits than its factorization.

55651428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73633 (or 73625 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 55651428 is about 7459.9884718410. The cubic root of 55651428 is about 381.7907811506.

It can be divided in two parts, 556 and 51428, that added together give a square (51984 = 228²).

The spelling of 55651428 in words is "fifty-five million, six hundred fifty-one thousand, four hundred twenty-eight".