52638732 has 36 divisors (see below), whose sum is σ = 140887656. Its totient is φ = 16513920.

The previous prime is 52638689. The next prime is 52638737. The reversal of 52638732 is 23783625.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×52638732² = 5541672213135648, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (52638737) 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, 42394 + ... + 43617.

It is an arithmetic number, because the mean of its divisors is an integer number (3913546).

Almost surely, 2^52638732 is an apocalyptic number.

It is an amenable number.

52638732 is an abundant number, since it is smaller than the sum of its proper divisors (88248924).

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

52638732 is a wasteful number, since it uses less digits than its factorization.

52638732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86038 (or 86033 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 52638732 is about 7255.2554744819. The cubic root of 52638732 is about 374.7731534694.

The spelling of 52638732 in words is "fifty-two million, six hundred thirty-eight thousand, seven hundred thirty-two".