72451396 has 24 divisors (see below), whose sum is σ = 131685120. Its totient is φ = 34837152.

The previous prime is 72451391. The next prime is 72451397. The reversal of 72451396 is 69315427.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (72451391) 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, 31725 + ... + 33931.

It is an arithmetic number, because the mean of its divisors is an integer number (5486880).

Almost surely, 2^72451396 is an apocalyptic number.

It is an amenable number.

72451396 is a deficient number, since it is larger than the sum of its proper divisors (59233724).

72451396 is a wasteful number, since it uses less digits than its factorization.

72451396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523 (or 2521 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 72451396 is about 8511.8385792965. The cubic root of 72451396 is about 416.8843443574.

The spelling of 72451396 in words is "seventy-two million, four hundred fifty-one thousand, three hundred ninety-six".