28293312013 has 16 divisors (see below), whose sum is σ = 29040379200. Its totient is φ = 27556379136.

The previous prime is 28293311993. The next prime is 28293312017. The reversal of 28293312013 is 31021339282.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28293312013 is a prime.

It is a super-2 number, since 2×28293312013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28293312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28293312017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10481538 + ... + 10484236.

It is an arithmetic number, because the mean of its divisors is an integer number (1815023700).

Almost surely, 2^28293312013 is an apocalyptic number.

It is an amenable number.

28293312013 is a deficient number, since it is larger than the sum of its proper divisors (747067187).

28293312013 is a wasteful number, since it uses less digits than its factorization.

28293312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 28293312013 in words is "twenty-eight billion, two hundred ninety-three million, three hundred twelve thousand, thirteen".