52001388 has 18 divisors (see below), whose sum is σ = 131448044. Its totient is φ = 17333784.

The previous prime is 52001333. The next prime is 52001399. The reversal of 52001388 is 88310025.

It is a happy number.

52001388 is a `hidden beast` number, since 520 + 0 + 138 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 722206 + ... + 722277.

Almost surely, 2^52001388 is an apocalyptic number.

It is an amenable number.

52001388 is an abundant number, since it is smaller than the sum of its proper divisors (79446656).

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

52001388 is a wasteful number, since it uses less digits than its factorization.

52001388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444493 (or 1444488 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 52001388 is about 7211.1987907698. The cubic root of 52001388 is about 373.2544366301.

The spelling of 52001388 in words is "fifty-two million, one thousand, three hundred eighty-eight".