28979476874 has 16 divisors (see below), whose sum is σ = 44975687400. Its totient is φ = 13987748544.

The previous prime is 28979476873. The next prime is 28979476909. The reversal of 28979476874 is 47867497982.

It can be written as a sum of positive squares in 4 ways, for example, as 7460640625 + 21518836249 = 86375^2 + 146693^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28979476798 and 28979476807.

It is not an unprimeable number, because it can be changed into a prime (28979476873) 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, 336584 + ... + 413820.

Almost surely, 2^28979476874 is an apocalyptic number.

28979476874 is a deficient number, since it is larger than the sum of its proper divisors (15996210526).

28979476874 is a wasteful number, since it uses less digits than its factorization.

28979476874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83737.

The product of its digits is 341397504, while the sum is 71.

It can be divided in two parts, 28 and 979476874, that multiplied together give a palindrome (27425352472).

The spelling of 28979476874 in words is "twenty-eight billion, nine hundred seventy-nine million, four hundred seventy-six thousand, eight hundred seventy-four".