72307039 has 8 divisors (see below), whose sum is σ = 83801088. Its totient is φ = 61104120.

The previous prime is 72307033. The next prime is 72307049. The reversal of 72307039 is 93070327.

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

It is not a de Polignac number, because 72307039 - 2⁵ = 72307007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72307039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72307033) 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, 72247 + ... + 73240.

It is an arithmetic number, because the mean of its divisors is an integer number (10475136).

Almost surely, 2^72307039 is an apocalyptic number.

72307039 is a deficient number, since it is larger than the sum of its proper divisors (11494049).

72307039 is a wasteful number, since it uses less digits than its factorization.

72307039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145565.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 72307039 is about 8503.3545733434. The cubic root of 72307039 is about 416.6072841951.

The spelling of 72307039 in words is "seventy-two million, three hundred seven thousand, thirty-nine".