72820022 has 32 divisors (see below), whose sum is σ = 122204160. Its totient is φ = 32266080.

The previous prime is 72820009. The next prime is 72820037. The reversal of 72820022 is 22002827.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 72820022.

It is a congruent number.

It is an unprimeable number.

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, 187004 + ... + 187392.

It is an arithmetic number, because the mean of its divisors is an integer number (3818880).

Almost surely, 2^72820022 is an apocalyptic number.

72820022 is a deficient number, since it is larger than the sum of its proper divisors (49384138).

72820022 is a wasteful number, since it uses less digits than its factorization.

72820022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 72820022 is about 8533.4648297160. The cubic root of 72820022 is about 417.5901716381.

Adding to 72820022 its reverse (22002827), we get a palindrome (94822849).

The spelling of 72820022 in words is "seventy-two million, eight hundred twenty thousand, twenty-two".