52606640 has 20 divisors (see below), whose sum is σ = 122310624. Its totient is φ = 21042624.

The previous prime is 52606639. The next prime is 52606643. The reversal of 52606640 is 4660625.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (52606643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328712 + ... + 328871.

Almost surely, 2^52606640 is an apocalyptic number.

It is an amenable number.

52606640 is an abundant number, since it is smaller than the sum of its proper divisors (69703984).

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

52606640 is a wasteful number, since it uses less digits than its factorization.

52606640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657596 (or 657590 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 52606640 is about 7253.0434991113. The cubic root of 52606640 is about 374.6969759438.

The spelling of 52606640 in words is "fifty-two million, six hundred six thousand, six hundred forty".