52644636 has 72 divisors (see below), whose sum is σ = 149136624. Its totient is φ = 15517440.

The previous prime is 52644629. The next prime is 52644643. The reversal of 52644636 is 63644625.

52644636 is a `hidden beast` number, since 5 + 2 + 644 + 6 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (52644629) and next prime (52644643).

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

It is a self number, because there is not a number n which added to its sum of digits gives 52644636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12856 + ... + 16448.

It is an arithmetic number, because the mean of its divisors is an integer number (2071342).

Almost surely, 2^52644636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52644636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74568312).

52644636 is an abundant number, since it is smaller than the sum of its proper divisors (96491988).

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

52644636 is a wasteful number, since it uses less digits than its factorization.

52644636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651 (or 3646 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 52644636 is about 7255.6623405448. The cubic root of 52644636 is about 374.7871645591.

The spelling of 52644636 in words is "fifty-two million, six hundred forty-four thousand, six hundred thirty-six".