72351312 has 40 divisors (see below), whose sum is σ = 203900640. Its totient is φ = 21924480.

The previous prime is 72351289. The next prime is 72351313. The reversal of 72351312 is 21315327.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72351313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67987 + ... + 69042.

It is an arithmetic number, because the mean of its divisors is an integer number (5097516).

Almost surely, 2^72351312 is an apocalyptic number.

It is an amenable number.

72351312 is an abundant number, since it is smaller than the sum of its proper divisors (131549328).

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

72351312 is a wasteful number, since it uses less digits than its factorization.

72351312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137051 (or 137045 counting only the distinct ones).

The product of its digits is 1260, while the sum is 24.

The square root of 72351312 is about 8505.9574416993. The cubic root of 72351312 is about 416.6922952414.

Adding to 72351312 its reverse (21315327), we get a palindrome (93666639).

The spelling of 72351312 in words is "seventy-two million, three hundred fifty-one thousand, three hundred twelve".