72220822 has 16 divisors (see below), whose sum is σ = 111093840. Its totient is φ = 35193312.

The previous prime is 72220801. The next prime is 72220823. The reversal of 72220822 is 22802227.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72220823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70788 + ... + 71800.

It is an arithmetic number, because the mean of its divisors is an integer number (6943365).

Almost surely, 2^72220822 is an apocalyptic number.

72220822 is a deficient number, since it is larger than the sum of its proper divisors (38873018).

72220822 is a wasteful number, since it uses less digits than its factorization.

72220822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 72220822 is about 8498.2834737375. The cubic root of 72220822 is about 416.4416345049.

The spelling of 72220822 in words is "seventy-two million, two hundred twenty thousand, eight hundred twenty-two".