28678583912 has 16 divisors (see below), whose sum is σ = 58660740000. Its totient is φ = 13035719920.

The previous prime is 28678583909. The next prime is 28678583917. The reversal of 28678583912 is 21938587682.

It is a super-2 number, since 2×28678583912² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28678583917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162946412 + ... + 162946587.

It is an arithmetic number, because the mean of its divisors is an integer number (3666296250).

Almost surely, 2^28678583912 is an apocalyptic number.

28678583912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28678583912 is an abundant number, since it is smaller than the sum of its proper divisors (29982156088).

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

28678583912 is a wasteful number, since it uses less digits than its factorization.

28678583912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325893016 (or 325893012 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 59.

The spelling of 28678583912 in words is "twenty-eight billion, six hundred seventy-eight million, five hundred eighty-three thousand, nine hundred twelve".