55428648 has 48 divisors (see below), whose sum is σ = 152322240. Its totient is φ = 16795680.

The previous prime is 55428623. The next prime is 55428767. The reversal of 55428648 is 84682455.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6640 + ... + 12447.

It is an arithmetic number, because the mean of its divisors is an integer number (3173380).

Almost surely, 2^55428648 is an apocalyptic number.

It is an amenable number.

55428648 is an abundant number, since it is smaller than the sum of its proper divisors (96893592).

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

55428648 is a wasteful number, since it uses less digits than its factorization.

55428648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19118 (or 19103 counting only the distinct ones).

The product of its digits is 307200, while the sum is 42.

The square root of 55428648 is about 7445.0418400436. The cubic root of 55428648 is about 381.2806468959.

The spelling of 55428648 in words is "fifty-five million, four hundred twenty-eight thousand, six hundred forty-eight".