52320618 has 48 divisors (see below), whose sum is σ = 130168896. Its totient is φ = 14878080.

The previous prime is 52320613. The next prime is 52320641. The reversal of 52320618 is 81602325.

52320618 is a `hidden beast` number, since 5 + 23 + 20 + 618 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 52320591 and 52320600.

It is not an unprimeable number, because it can be changed into a prime (52320613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29505 + ... + 31227.

It is an arithmetic number, because the mean of its divisors is an integer number (2711852).

Almost surely, 2^52320618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52320618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65084448).

52320618 is an abundant number, since it is smaller than the sum of its proper divisors (77848278).

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

52320618 is a wasteful number, since it uses less digits than its factorization.

52320618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 52320618 is about 7233.2992472315. The cubic root of 52320618 is about 374.0166664006.

The spelling of 52320618 in words is "fifty-two million, three hundred twenty thousand, six hundred eighteen".