52639128 has 48 divisors (see below), whose sum is σ = 142950600. Its totient is φ = 17498880.

The previous prime is 52639109. The next prime is 52639159. The reversal of 52639128 is 82193625.

52639128 is a `hidden beast` number, since 5 + 2 + 639 + 12 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 52639092 and 52639101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34608 + ... + 36096.

Almost surely, 2^52639128 is an apocalyptic number.

It is an amenable number.

52639128 is an abundant number, since it is smaller than the sum of its proper divisors (90311472).

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

52639128 is a wasteful number, since it uses less digits than its factorization.

52639128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992 (or 1985 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 52639128 is about 7255.2827649927. The cubic root of 52639128 is about 374.7740932704.

The spelling of 52639128 in words is "fifty-two million, six hundred thirty-nine thousand, one hundred twenty-eight".