53393994 has 24 divisors (see below), whose sum is σ = 120717792. Its totient is φ = 17024040.

The previous prime is 53393987. The next prime is 53393999. The reversal of 53393994 is 49939335.

It is not an unprimeable number, because it can be changed into a prime (53393999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64072 + ... + 64899.

It is an arithmetic number, because the mean of its divisors is an integer number (5029908).

Almost surely, 2^53393994 is an apocalyptic number.

53393994 is an abundant number, since it is smaller than the sum of its proper divisors (67323798).

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

53393994 is a wasteful number, since it uses less digits than its factorization.

53393994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129002 (or 128999 counting only the distinct ones).

The product of its digits is 393660, while the sum is 45.

The square root of 53393994 is about 7307.1194050734. The cubic root of 53393994 is about 376.5570671633.

The spelling of 53393994 in words is "fifty-three million, three hundred ninety-three thousand, nine hundred ninety-four".