53728520 has 32 divisors (see below), whose sum is σ = 123465600. Its totient is φ = 21033408.

The previous prime is 53728489. The next prime is 53728531. The reversal of 53728520 is 2582735.

It is a super-2 number, since 2×53728520² = 5773507722780800, which contains 22 as substring.

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, 12410 + ... + 16169.

It is an arithmetic number, because the mean of its divisors is an integer number (3858300).

Almost surely, 2^53728520 is an apocalyptic number.

It is an amenable number.

53728520 is an abundant number, since it is smaller than the sum of its proper divisors (69737080).

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

53728520 is a wasteful number, since it uses less digits than its factorization.

53728520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28637 (or 28633 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 53728520 is about 7329.9740790810. The cubic root of 53728520 is about 377.3418368757.

The spelling of 53728520 in words is "fifty-three million, seven hundred twenty-eight thousand, five hundred twenty".