72310612 has 12 divisors (see below), whose sum is σ = 138047616. Its totient is φ = 32868440.

The previous prime is 72310607. The next prime is 72310619. The reversal of 72310612 is 21601327.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72310619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821668 + ... + 821755.

It is an arithmetic number, because the mean of its divisors is an integer number (11503968).

Almost surely, 2^72310612 is an apocalyptic number.

It is an amenable number.

72310612 is a deficient number, since it is larger than the sum of its proper divisors (65737004).

72310612 is a wasteful number, since it uses less digits than its factorization.

72310612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643438 (or 1643436 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 72310612 is about 8503.5646643040. The cubic root of 72310612 is about 416.6141461979.

Adding to 72310612 its reverse (21601327), we get a palindrome (93911939).

The spelling of 72310612 in words is "seventy-two million, three hundred ten thousand, six hundred twelve".