72216884 has 12 divisors (see below), whose sum is σ = 133813764. Its totient is φ = 33984384.

The previous prime is 72216883. The next prime is 72216913. The reversal of 72216884 is 48861227.

It can be written as a sum of positive squares in 2 ways, for example, as 35880100 + 36336784 = 5990^2 + 6028^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72216883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530939 + ... + 531074.

It is an arithmetic number, because the mean of its divisors is an integer number (11151147).

Almost surely, 2^72216884 is an apocalyptic number.

It is an amenable number.

72216884 is a deficient number, since it is larger than the sum of its proper divisors (61596880).

72216884 is a wasteful number, since it uses less digits than its factorization.

72216884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062034 (or 1062032 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 72216884 is about 8498.0517767309. The cubic root of 72216884 is about 416.4340652337.

The spelling of 72216884 in words is "seventy-two million, two hundred sixteen thousand, eight hundred eighty-four".