28404868928 has 14 divisors (see below), whose sum is σ = 56365911906. Its totient is φ = 14202434432.

The previous prime is 28404868909. The next prime is 28404868951. The reversal of 28404868928 is 82986840482.

It can be written as a sum of positive squares in only one way, i.e., 19241018944 + 9163849984 = 138712^2 + 95728^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221912975 + ... + 221913102.

Almost surely, 2^28404868928 is an apocalyptic number.

It is an amenable number.

28404868928 is a deficient number, since it is larger than the sum of its proper divisors (27961042978).

28404868928 is an equidigital number, since it uses as much as digits as its factorization.

28404868928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443826089 (or 443826079 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 59.

The spelling of 28404868928 in words is "twenty-eight billion, four hundred four million, eight hundred sixty-eight thousand, nine hundred twenty-eight".