28304112456 has 24 divisors (see below), whose sum is σ = 76656971430. Its totient is φ = 9434704128.

The previous prime is 28304112377. The next prime is 28304112467. The reversal of 28304112456 is 65421140382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26273168100 + 2030944356 = 162090^2 + 45066^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×28304112456² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28304112456.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196556265 + ... + 196556408.

Almost surely, 2^28304112456 is an apocalyptic number.

It is an amenable number.

28304112456 is an abundant number, since it is smaller than the sum of its proper divisors (48352858974).

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

28304112456 is a wasteful number, since it uses less digits than its factorization.

28304112456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393112685 (or 393112678 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 28304112456 in words is "twenty-eight billion, three hundred four million, one hundred twelve thousand, four hundred fifty-six".