52756638 has 16 divisors (see below), whose sum is σ = 115105536. Its totient is φ = 15986840.

The previous prime is 52756633. The next prime is 52756663. The reversal of 52756638 is 83665725.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 52756638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52756633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399606 + ... + 399737.

It is an arithmetic number, because the mean of its divisors is an integer number (7194096).

Almost surely, 2^52756638 is an apocalyptic number.

52756638 is an abundant number, since it is smaller than the sum of its proper divisors (62348898).

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

52756638 is a wasteful number, since it uses less digits than its factorization.

52756638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799359.

The product of its digits is 302400, while the sum is 42.

The square root of 52756638 is about 7263.3764875573. The cubic root of 52756638 is about 375.0527641311.

The spelling of 52756638 in words is "fifty-two million, seven hundred fifty-six thousand, six hundred thirty-eight".