28879888931 has 8 divisors (see below), whose sum is σ = 29946723600. Its totient is φ = 27817786080.

The previous prime is 28879888903. The next prime is 28879888963. The reversal of 28879888931 is 13988897882.

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 28879888931 - 2¹⁴ = 28879872547 is a prime.

It is a super-2 number, since 2×28879888931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28879888991) 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, 1170521 + ... + 1194938.

It is an arithmetic number, because the mean of its divisors is an integer number (3743340450).

Almost surely, 2^28879888931 is an apocalyptic number.

28879888931 is a deficient number, since it is larger than the sum of its proper divisors (1066834669).

28879888931 is a wasteful number, since it uses less digits than its factorization.

28879888931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365909.

The product of its digits is 111476736, while the sum is 71.

The spelling of 28879888931 in words is "twenty-eight billion, eight hundred seventy-nine million, eight hundred eighty-eight thousand, nine hundred thirty-one".