72312426 has 28 divisors (see below), whose sum is σ = 162631842. Its totient is φ = 24103656.

The previous prime is 72312379. The next prime is 72312521. The reversal of 72312426 is 62421327.

72312426 is a `hidden beast` number, since 7 + 231 + 2 + 426 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71419401 + 893025 = 8451^2 + 945^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 72312426.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 23341 + ... + 26256.

Almost surely, 2^72312426 is an apocalyptic number.

72312426 is an abundant number, since it is smaller than the sum of its proper divisors (90319416).

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

72312426 is an equidigital number, since it uses as much as digits as its factorization.

72312426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49617 (or 49602 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 72312426 is about 8503.6713247867. The cubic root of 72312426 is about 416.6176299270.

The spelling of 72312426 in words is "seventy-two million, three hundred twelve thousand, four hundred twenty-six".