28294980012 has 36 divisors (see below), whose sum is σ = 77025224640. Its totient is φ = 8706147552.

The previous prime is 28294979899. The next prime is 28294980073. The reversal of 28294980012 is 21008949282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28294980012.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30229212 + ... + 30230147.

Almost surely, 2^28294980012 is an apocalyptic number.

It is an amenable number.

28294980012 is an abundant number, since it is smaller than the sum of its proper divisors (48730244628).

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

28294980012 is a wasteful number, since it uses less digits than its factorization.

28294980012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60459382 (or 60459377 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 28294980012 in words is "twenty-eight billion, two hundred ninety-four million, nine hundred eighty thousand, twelve".