28280004012 has 60 divisors (see below), whose sum is σ = 79616414416. Its totient is φ = 8701538400.

The previous prime is 28280003977. The next prime is 28280004023. The reversal of 28280004012 is 21040008282.

It is a super-2 number, since 2×28280004012² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3352864 + ... + 3361287.

Almost surely, 2^28280004012 is an apocalyptic number.

It is an amenable number.

28280004012 is an abundant number, since it is smaller than the sum of its proper divisors (51336410404).

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

28280004012 is a wasteful number, since it uses less digits than its factorization.

28280004012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6714180 (or 6714169 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The spelling of 28280004012 in words is "twenty-eight billion, two hundred eighty million, four thousand, twelve".