28294980072 has 32 divisors (see below), whose sum is σ = 73176674400. Its totient is φ = 9106430144.

The previous prime is 28294979899. The next prime is 28294980073. The reversal of 28294980072 is 27008949282.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28294979997 and 28294980024.

It is not an unprimeable number, because it can be changed into a prime (28294980073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20326158 + ... + 20327549.

It is an arithmetic number, because the mean of its divisors is an integer number (2286771075).

Almost surely, 2^28294980072 is an apocalyptic number.

It is an amenable number.

28294980072 is an abundant number, since it is smaller than the sum of its proper divisors (44881694328).

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

28294980072 is a wasteful number, since it uses less digits than its factorization.

28294980072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40653745 (or 40653741 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 28294980072 in words is "twenty-eight billion, two hundred ninety-four million, nine hundred eighty thousand, seventy-two".