72339865 has 8 divisors (see below), whose sum is σ = 93485448. Its totient is φ = 53420160.

The previous prime is 72339809. The next prime is 72339877. The reversal of 72339865 is 56893327.

It can be written as a sum of positive squares in 4 ways, for example, as 700569 + 71639296 = 837^2 + 8464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72339865 - 2¹³ = 72331673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556396 + ... + 556525.

It is an arithmetic number, because the mean of its divisors is an integer number (11685681).

Almost surely, 2^72339865 is an apocalyptic number.

It is an amenable number.

72339865 is a deficient number, since it is larger than the sum of its proper divisors (21145583).

72339865 is a wasteful number, since it uses less digits than its factorization.

72339865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112939.

The product of its digits is 272160, while the sum is 43.

The square root of 72339865 is about 8505.2845337472. The cubic root of 72339865 is about 416.6703185458.

The spelling of 72339865 in words is "seventy-two million, three hundred thirty-nine thousand, eight hundred sixty-five".