52658640 has 80 divisors (see below), whose sum is σ = 181387200. Its totient is φ = 14041728.

The previous prime is 52658629. The next prime is 52658653. The reversal of 52658640 is 4685625.

52658640 is a `hidden beast` number, since 5 + 2 + 6 + 5 + 8 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 52658595 and 52658604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10030 + ... + 14349.

It is an arithmetic number, because the mean of its divisors is an integer number (2267340).

Almost surely, 2^52658640 is an apocalyptic number.

It is an amenable number.

52658640 is an abundant number, since it is smaller than the sum of its proper divisors (128728560).

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

52658640 is a wasteful number, since it uses less digits than its factorization.

52658640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24401 (or 24389 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 52658640 is about 7256.6273157714. The cubic root of 52658640 is about 374.8203939916.

The spelling of 52658640 in words is "fifty-two million, six hundred fifty-eight thousand, six hundred forty".