53390568 has 128 divisors (see below), whose sum is σ = 168376320. Its totient is φ = 13704960.

The previous prime is 53390549. The next prime is 53390621. The reversal of 53390568 is 86509335.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 308530 + ... + 308702.

It is an arithmetic number, because the mean of its divisors is an integer number (1315440).

Almost surely, 2^53390568 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 53390568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84188160).

53390568 is an abundant number, since it is smaller than the sum of its proper divisors (114985752).

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

53390568 is a wasteful number, since it uses less digits than its factorization.

53390568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 53390568 is about 7306.8849724079. The cubic root of 53390568 is about 376.5490131232.

The spelling of 53390568 in words is "fifty-three million, three hundred ninety thousand, five hundred sixty-eight".