53390556 has 96 divisors (see below), whose sum is σ = 147087360. Its totient is φ = 16718400.

The previous prime is 53390549. The next prime is 53390621. The reversal of 53390556 is 65509335.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 53390556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123661 + ... + 124091.

It is an arithmetic number, because the mean of its divisors is an integer number (1532160).

Almost surely, 2^53390556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53390556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73543680).

53390556 is an abundant number, since it is smaller than the sum of its proper divisors (93696804).

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

53390556 is a wasteful number, since it uses less digits than its factorization.

53390556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 36.

The square root of 53390556 is about 7306.8841512645. The cubic root of 53390556 is about 376.5489849123.

The spelling of 53390556 in words is "fifty-three million, three hundred ninety thousand, five hundred fifty-six".