52621788 has 12 divisors (see below), whose sum is σ = 122784200. Its totient is φ = 17540592.

The previous prime is 52621781. The next prime is 52621799. The reversal of 52621788 is 88712625.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52621781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192563 + ... + 2192586.

Almost surely, 2^52621788 is an apocalyptic number.

It is an amenable number.

52621788 is an abundant number, since it is smaller than the sum of its proper divisors (70162412).

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

52621788 is a wasteful number, since it uses less digits than its factorization.

52621788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385156 (or 4385154 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 52621788 is about 7254.0876752353. The cubic root of 52621788 is about 374.7329369625.

The spelling of 52621788 in words is "fifty-two million, six hundred twenty-one thousand, seven hundred eighty-eight".