28404978204 has 12 divisors (see below), whose sum is σ = 66278282504. Its totient is φ = 9468326064.

The previous prime is 28404978163. The next prime is 28404978209. The reversal of 28404978204 is 40287940482.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28404978209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183540747 + ... + 1183540770.

Almost surely, 2^28404978204 is an apocalyptic number.

It is an amenable number.

28404978204 is an abundant number, since it is smaller than the sum of its proper divisors (37873304300).

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

28404978204 is a wasteful number, since it uses less digits than its factorization.

28404978204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367081524 (or 2367081522 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 28404978204 in words is "twenty-eight billion, four hundred four million, nine hundred seventy-eight thousand, two hundred four".