53920728 has 48 divisors (see below), whose sum is σ = 151449480. Its totient is φ = 17972928.

The previous prime is 53920721. The next prime is 53920747. The reversal of 53920728 is 82702935.

It is a happy number.

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 = 53920692 and 53920701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53920721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11925 + ... + 15812.

Almost surely, 2^53920728 is an apocalyptic number.

It is an amenable number.

53920728 is an abundant number, since it is smaller than the sum of its proper divisors (97528752).

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

53920728 is a wasteful number, since it uses less digits than its factorization.

53920728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27758 (or 27742 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 53920728 is about 7343.0734709657. The cubic root of 53920728 is about 377.7912679791.

The spelling of 53920728 in words is "fifty-three million, nine hundred twenty thousand, seven hundred twenty-eight".