72870039 has 12 divisors (see below), whose sum is σ = 114825672. Its totient is φ = 44163600.

The previous prime is 72870029. The next prime is 72870047. The reversal of 72870039 is 93007827.

It is not a de Polignac number, because 72870039 - 2⁴ = 72870023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72869985 and 72870012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72870029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367932 + ... + 368129.

It is an arithmetic number, because the mean of its divisors is an integer number (9568806).

Almost surely, 2^72870039 is an apocalyptic number.

72870039 is a deficient number, since it is larger than the sum of its proper divisors (41955633).

72870039 is a wasteful number, since it uses less digits than its factorization.

72870039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736078 (or 736075 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 72870039 is about 8536.3949650892. The cubic root of 72870039 is about 417.6857581120.

The spelling of 72870039 in words is "seventy-two million, eight hundred seventy thousand, thirty-nine".