52636640 has 48 divisors (see below), whose sum is σ = 142121952. Its totient is φ = 18046464.

The previous prime is 52636609. The next prime is 52636679. The reversal of 52636640 is 4663625.

52636640 = T₉ + T₁₀ + ... + T₆₈₀.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 52636597 and 52636606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22379 + ... + 24618.

It is an arithmetic number, because the mean of its divisors is an integer number (2960874).

Almost surely, 2^52636640 is an apocalyptic number.

It is an amenable number.

52636640 is an abundant number, since it is smaller than the sum of its proper divisors (89485312).

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

52636640 is a wasteful number, since it uses less digits than its factorization.

52636640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47019 (or 47011 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 52636640 is about 7255.1113016962. Note that the first 3 decimals coincide. The cubic root of 52636640 is about 374.7681885840.

The spelling of 52636640 in words is "fifty-two million, six hundred thirty-six thousand, six hundred forty".