52640618 has 8 divisors (see below), whose sum is σ = 79012260. Its totient is φ = 26303200.

The previous prime is 52640587. The next prime is 52640641. The reversal of 52640618 is 81604625.

It can be written as a sum of positive squares in 2 ways, for example, as 50879689 + 1760929 = 7133^2 + 1327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4283 + ... + 11118.

Almost surely, 2^52640618 is an apocalyptic number.

52640618 is a deficient number, since it is larger than the sum of its proper divisors (26371642).

52640618 is a wasteful number, since it uses less digits than its factorization.

52640618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17112.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 52640618 is about 7255.3854480655. The cubic root of 52640618 is about 374.7776293480. Note that the first 3 decimals are identical.

The spelling of 52640618 in words is "fifty-two million, six hundred forty thousand, six hundred eighteen".