28973176639 has 8 divisors (see below), whose sum is σ = 31612936320. Its totient is φ = 26334389400.

The previous prime is 28973176633. The next prime is 28973176643. The reversal of 28973176639 is 93667137982.

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

It is not a de Polignac number, because 28973176639 - 2⁵ = 28973176607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28973176633) 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, 180097 + ... + 300634.

It is an arithmetic number, because the mean of its divisors is an integer number (3951617040).

Almost surely, 2^28973176639 is an apocalyptic number.

28973176639 is a deficient number, since it is larger than the sum of its proper divisors (2639759681).

28973176639 is a wasteful number, since it uses less digits than its factorization.

28973176639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486221.

The product of its digits is 20575296, while the sum is 61.

The spelling of 28973176639 in words is "twenty-eight billion, nine hundred seventy-three million, one hundred seventy-six thousand, six hundred thirty-nine".