72731622 has 32 divisors (see below), whose sum is σ = 149960160. Its totient is φ = 23502080.

The previous prime is 72731621. The next prime is 72731629. The reversal of 72731622 is 22613727.

It is a self number, because there is not a number n which added to its sum of digits gives 72731622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72731621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41704 + ... + 43412.

It is an arithmetic number, because the mean of its divisors is an integer number (4686255).

Almost surely, 2^72731622 is an apocalyptic number.

72731622 is an abundant number, since it is smaller than the sum of its proper divisors (77228538).

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

72731622 is a wasteful number, since it uses less digits than its factorization.

72731622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928.

The product of its digits is 7056, while the sum is 30.

The square root of 72731622 is about 8528.2836491289. The cubic root of 72731622 is about 417.4211250952.

The spelling of 72731622 in words is "seventy-two million, seven hundred thirty-one thousand, six hundred twenty-two".