72222592 has 32 divisors (see below), whose sum is σ = 154952280. Its totient is φ = 33332736.

The previous prime is 72222589. The next prime is 72222617. The reversal of 72222592 is 29522227.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×72222592² = 10432205590396928, which contains 22 as substring.

It is a congruent 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, 20038 + ... + 23365.

Almost surely, 2^72222592 is an apocalyptic number.

It is an amenable number.

72222592 is an abundant number, since it is smaller than the sum of its proper divisors (82729688).

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

72222592 is a wasteful number, since it uses less digits than its factorization.

72222592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43430 (or 43418 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 72222592 is about 8498.3876117767. The cubic root of 72222592 is about 416.4450365509.

The spelling of 72222592 in words is "seventy-two million, two hundred twenty-two thousand, five hundred ninety-two".