55353728 has 64 divisors (see below), whose sum is σ = 115117200. Its totient is φ = 26492928.

The previous prime is 55353703. The next prime is 55353743. The reversal of 55353728 is 82735355.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 55353691 and 55353700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489800 + ... + 489912.

Almost surely, 2^55353728 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 55353728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57558600).

55353728 is an abundant number, since it is smaller than the sum of its proper divisors (59763472).

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

55353728 is a wasteful number, since it uses less digits than its factorization.

55353728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 247 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 55353728 is about 7440.0086021456. The cubic root of 55353728 is about 381.1087837472.

The spelling of 55353728 in words is "fifty-five million, three hundred fifty-three thousand, seven hundred twenty-eight".