52218396 has 72 divisors (see below), whose sum is σ = 136936800. Its totient is φ = 16765056.

The previous prime is 52218343. The next prime is 52218401. The reversal of 52218396 is 69381225.

52218396 is a `hidden beast` number, since 52 + 218 + 396 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 52218396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262305 + ... + 262503.

It is an arithmetic number, because the mean of its divisors is an integer number (1901900).

Almost surely, 2^52218396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52218396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68468400).

52218396 is an abundant number, since it is smaller than the sum of its proper divisors (84718404).

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

52218396 is a wasteful number, since it uses less digits than its factorization.

52218396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 438 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 52218396 is about 7226.2297223379. The cubic root of 52218396 is about 373.7729278299.

The spelling of 52218396 in words is "fifty-two million, two hundred eighteen thousand, three hundred ninety-six".