28870216836 has 24 divisors (see below), whose sum is σ = 67366619040. Its totient is φ = 9623008512.

The previous prime is 28870216829. The next prime is 28870216841. The reversal of 28870216836 is 63861207882.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475575 + ... + 532833.

It is an arithmetic number, because the mean of its divisors is an integer number (2806942460).

Almost surely, 2^28870216836 is an apocalyptic number.

It is an amenable number.

28870216836 is an abundant number, since it is smaller than the sum of its proper divisors (38496402204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28870216836 is a wasteful number, since it uses less digits than its factorization.

28870216836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99283 (or 99281 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 28870216836 in words is "twenty-eight billion, eight hundred seventy million, two hundred sixteen thousand, eight hundred thirty-six".