53731638 has 24 divisors (see below), whose sum is σ = 116597208. Its totient is φ = 17883072.

The previous prime is 53731637. The next prime is 53731651. The reversal of 53731638 is 83613735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53731637) 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, 12270 + ... + 16062.

It is an arithmetic number, because the mean of its divisors is an integer number (4858217).

Almost surely, 2^53731638 is an apocalyptic number.

53731638 is an abundant number, since it is smaller than the sum of its proper divisors (62865570).

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

53731638 is a wasteful number, since it uses less digits than its factorization.

53731638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588 (or 4585 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 53731638 is about 7330.1867643328. The cubic root of 53731638 is about 377.3491360971.

The spelling of 53731638 in words is "fifty-three million, seven hundred thirty-one thousand, six hundred thirty-eight".