28612999680 has 80 divisors (see below), whose sum is σ = 91472207904. Its totient is φ = 7630131200.

The previous prime is 28612999673. The next prime is 28612999697. The reversal of 28612999680 is 8699921682.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1855146 + ... + 1870505.

Almost surely, 2^28612999680 is an apocalyptic number.

28612999680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28612999680 is an abundant number, since it is smaller than the sum of its proper divisors (62859208224).

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

28612999680 is an equidigital number, since it uses as much as digits as its factorization.

28612999680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725677 (or 3725661 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 60.

The spelling of 28612999680 in words is "twenty-eight billion, six hundred twelve million, nine hundred ninety-nine thousand, six hundred eighty".