28112664285 has 24 divisors (see below), whose sum is σ = 48732731424. Its totient is φ = 14992155360.

The previous prime is 28112664149. The next prime is 28112664301. The reversal of 28112664285 is 58246621182.

It is not a de Polignac number, because 28112664285 - 2⁹ = 28112663773 is a prime.

It is a super-2 number, since 2×28112664285² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28112664285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 791314 + ... + 826076.

It is an arithmetic number, because the mean of its divisors is an integer number (2030530476).

Almost surely, 2^28112664285 is an apocalyptic number.

It is an amenable number.

28112664285 is a deficient number, since it is larger than the sum of its proper divisors (20620067139).

28112664285 is a wasteful number, since it uses less digits than its factorization.

28112664285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52745 (or 52742 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The spelling of 28112664285 in words is "twenty-eight billion, one hundred twelve million, six hundred sixty-four thousand, two hundred eighty-five".