55036728 has 24 divisors (see below), whose sum is σ = 149058000. Its totient is φ = 18345552.

The previous prime is 55036727. The next prime is 55036739. The reversal of 55036728 is 82763055.

55036728 is a `hidden beast` number, since 550 + 36 + 72 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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 = 55036692 and 55036701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55036721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 382128 + ... + 382271.

It is an arithmetic number, because the mean of its divisors is an integer number (6210750).

Almost surely, 2^55036728 is an apocalyptic number.

It is an amenable number.

55036728 is an abundant number, since it is smaller than the sum of its proper divisors (94021272).

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

55036728 is a wasteful number, since it uses less digits than its factorization.

55036728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764411 (or 764404 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 55036728 is about 7418.6742750979. The cubic root of 55036728 is about 380.3798786572.

The spelling of 55036728 in words is "fifty-five million, thirty-six thousand, seven hundred twenty-eight".