55459728 has 50 divisors (see below), whose sum is σ = 160520294. Its totient is φ = 18486144.

The previous prime is 55459681. The next prime is 55459741. The reversal of 55459728 is 82795455.

55459728 is a `hidden beast` number, since 5 + 54 + 597 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 47775744 + 7683984 = 6912^2 + 2772^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20101 + ... + 22692.

Almost surely, 2^55459728 is an apocalyptic number.

It is an amenable number.

55459728 is an abundant number, since it is smaller than the sum of its proper divisors (105060566).

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

55459728 is a wasteful number, since it uses less digits than its factorization.

55459728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42813 (or 42798 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 55459728 is about 7447.1288427152. The cubic root of 55459728 is about 381.3518975862.

The spelling of 55459728 in words is "fifty-five million, four hundred fifty-nine thousand, seven hundred twenty-eight".