28267879387 has 24 divisors (see below), whose sum is σ = 32158185840. Its totient is φ = 24639940800.

The previous prime is 28267879379. The next prime is 28267879391. The reversal of 28267879387 is 78397876282.

It is not a de Polignac number, because 28267879387 - 2³ = 28267879379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28267879687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1139973 + ... + 1164505.

It is an arithmetic number, because the mean of its divisors is an integer number (1339924410).

Almost surely, 2^28267879387 is an apocalyptic number.

28267879387 is a deficient number, since it is larger than the sum of its proper divisors (3890306453).

28267879387 is a wasteful number, since it uses less digits than its factorization.

28267879387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24715 (or 24684 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 67.

The spelling of 28267879387 in words is "twenty-eight billion, two hundred sixty-seven million, eight hundred seventy-nine thousand, three hundred eighty-seven".