72219912 has 64 divisors (see below), whose sum is σ = 191928000. Its totient is φ = 22581504.

The previous prime is 72219911. The next prime is 72219923. The reversal of 72219912 is 21991227.

It is not an unprimeable number, because it can be changed into a prime (72219911) 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 15 ways as a sum of consecutive naturals, for example, 48978 + ... + 50430.

It is an arithmetic number, because the mean of its divisors is an integer number (2998875).

Almost surely, 2^72219912 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 72219912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95964000).

72219912 is an abundant number, since it is smaller than the sum of its proper divisors (119708088).

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

72219912 is a wasteful number, since it uses less digits than its factorization.

72219912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590 (or 1586 counting only the distinct ones).

The product of its digits is 4536, while the sum is 33.

The square root of 72219912 is about 8498.2299333449. The cubic root of 72219912 is about 416.4398854088.

The spelling of 72219912 in words is "seventy-two million, two hundred nineteen thousand, nine hundred twelve".