53917990 has 32 divisors (see below), whose sum is σ = 114499584. Its totient is φ = 17889120.

The previous prime is 53917987. The next prime is 53918027. The reversal of 53917990 is 9971935.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10254 + ... + 14593.

It is an arithmetic number, because the mean of its divisors is an integer number (3578112).

Almost surely, 2^53917990 is an apocalyptic number.

53917990 is an abundant number, since it is smaller than the sum of its proper divisors (60581594).

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

53917990 is a wasteful number, since it uses less digits than its factorization.

53917990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24892.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 53917990 is about 7342.8870344027. The cubic root of 53917990 is about 377.7848733449.

The spelling of 53917990 in words is "fifty-three million, nine hundred seventeen thousand, nine hundred ninety".