52636644 has 72 divisors (see below), whose sum is σ = 139979840. Its totient is φ = 16656192.

The previous prime is 52636609. The next prime is 52636679. The reversal of 52636644 is 44663625.

52636644 is a `hidden beast` number, since 5 + 2 + 6 + 3 + 6 + 644 = 666.

52636644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (52636609) and next prime (52636679).

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 = 52636599 and 52636608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56817 + ... + 57735.

Almost surely, 2^52636644 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 52636644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69989920).

52636644 is an abundant number, since it is smaller than the sum of its proper divisors (87343196).

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

52636644 is a wasteful number, since it uses less digits than its factorization.

52636644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1004 counting only the distinct ones).

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

The square root of 52636644 is about 7255.1115773639. Note that the first 3 decimals coincide. The cubic root of 52636644 is about 374.7681980772.

The spelling of 52636644 in words is "fifty-two million, six hundred thirty-six thousand, six hundred forty-four".