53245728 has 48 divisors (see below), whose sum is σ = 155302560. Its totient is φ = 17748288.

The previous prime is 53245727. The next prime is 53245781. The reversal of 53245728 is 82754235.

It is a tau number, because it is divible by the number of its divisors (48).

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 = 53245692 and 53245701.

It is not an unprimeable number, because it can be changed into a prime (53245721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29950 + ... + 31677.

It is an arithmetic number, because the mean of its divisors is an integer number (3235470).

Almost surely, 2^53245728 is an apocalyptic number.

It is an amenable number.

53245728 is an abundant number, since it is smaller than the sum of its proper divisors (102056832).

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

53245728 is a wasteful number, since it uses less digits than its factorization.

53245728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61646 (or 61632 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 53245728 is about 7296.9670411754. The cubic root of 53245728 is about 376.2081991655.

The spelling of 53245728 in words is "fifty-three million, two hundred forty-five thousand, seven hundred twenty-eight".