72320122 has 32 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 30067440.

The previous prime is 72320107. The next prime is 72320147. The reversal of 72320122 is 22102327.

It is a self number, because there is not a number n which added to its sum of digits gives 72320122.

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, 85779 + ... + 86617.

It is an arithmetic number, because the mean of its divisors is an integer number (3991680).

Almost surely, 2^72320122 is an apocalyptic number.

72320122 is a deficient number, since it is larger than the sum of its proper divisors (55413638).

72320122 is a wasteful number, since it uses less digits than its factorization.

72320122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 72320122 is about 8504.1238231813. The cubic root of 72320122 is about 416.6324092013.

Adding to 72320122 its reverse (22102327), we get a palindrome (94422449).

The spelling of 72320122 in words is "seventy-two million, three hundred twenty thousand, one hundred twenty-two".