72718122 has 16 divisors (see below), whose sum is σ = 145572480. Its totient is φ = 24216672.

The previous prime is 72718097. The next prime is 72718123. The reversal of 72718122 is 22181727.

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 72718122.

It is not an unprimeable number, because it can be changed into a prime (72718123) 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 7 ways as a sum of consecutive naturals, for example, 2079 + ... + 12237.

It is an arithmetic number, because the mean of its divisors is an integer number (9098280).

Almost surely, 2^72718122 is an apocalyptic number.

72718122 is an abundant number, since it is smaller than the sum of its proper divisors (72854358).

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

72718122 is a wasteful number, since it uses less digits than its factorization.

72718122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11357.

The product of its digits is 3136, while the sum is 30.

The square root of 72718122 is about 8527.4921284045. The cubic root of 72718122 is about 417.3952971095.

Adding to 72718122 its reverse (22181727), we get a palindrome (94899849).

The spelling of 72718122 in words is "seventy-two million, seven hundred eighteen thousand, one hundred twenty-two".