72439605 has 48 divisors (see below), whose sum is σ = 146240640. Its totient is φ = 32482944.

The previous prime is 72439589. The next prime is 72439613. The reversal of 72439605 is 50693427.

72439605 is a `hidden beast` number, since 7 + 2 + 43 + 9 + 605 = 666.

It is not a de Polignac number, because 72439605 - 2⁴ = 72439589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72439605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14526 + ... + 18864.

It is an arithmetic number, because the mean of its divisors is an integer number (3046680).

Almost surely, 2^72439605 is an apocalyptic number.

It is an amenable number.

72439605 is an abundant number, since it is smaller than the sum of its proper divisors (73801035).

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

72439605 is a wasteful number, since it uses less digits than its factorization.

72439605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 72439605 is about 8511.1459275470. The cubic root of 72439605 is about 416.8617280461.

The spelling of 72439605 in words is "seventy-two million, four hundred thirty-nine thousand, six hundred five".