28872938939 has 8 divisors (see below), whose sum is σ = 31177301232. Its totient is φ = 26580486240.

The previous prime is 28872938917. The next prime is 28872938951. The reversal of 28872938939 is 93983927882.

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

It is a cyclic number.

It is not a de Polignac number, because 28872938939 - 2²⁸ = 28604503483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28872938909) 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, 2972357 + ... + 2982054.

It is an arithmetic number, because the mean of its divisors is an integer number (3897162654).

Almost surely, 2^28872938939 is an apocalyptic number.

28872938939 is a deficient number, since it is larger than the sum of its proper divisors (2304362293).

28872938939 is a wasteful number, since it uses less digits than its factorization.

28872938939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5954797.

The product of its digits is 94058496, while the sum is 68.

The spelling of 28872938939 in words is "twenty-eight billion, eight hundred seventy-two million, nine hundred thirty-eight thousand, nine hundred thirty-nine".