53639720 has 32 divisors (see below), whose sum is σ = 121651200. Its totient is φ = 21284928.

The previous prime is 53639711. The next prime is 53639741. The reversal of 53639720 is 2793635.

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, 200 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (3801600).

Almost surely, 2^53639720 is an apocalyptic number.

It is an amenable number.

53639720 is an abundant number, since it is smaller than the sum of its proper divisors (68011480).

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

53639720 is a wasteful number, since it uses less digits than its factorization.

53639720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10697 (or 10693 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 53639720 is about 7323.9142540038. The cubic root of 53639720 is about 377.1338378949.

The spelling of 53639720 in words is "fifty-three million, six hundred thirty-nine thousand, seven hundred twenty".