28081802313 has 24 divisors (see below), whose sum is σ = 40863453696. Its totient is φ = 18582775200.

The previous prime is 28081802311. The next prime is 28081802317. The reversal of 28081802313 is 31320818082.

It is not a de Polignac number, because 28081802313 - 2¹ = 28081802311 is a prime.

It is a super-2 number, since 2×28081802313² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28081802311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 785283 + ... + 820263.

It is an arithmetic number, because the mean of its divisors is an integer number (1702643904).

Almost surely, 2^28081802313 is an apocalyptic number.

It is an amenable number.

28081802313 is a deficient number, since it is larger than the sum of its proper divisors (12781651383).

28081802313 is a wasteful number, since it uses less digits than its factorization.

28081802313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35645 (or 35642 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 28081802313 in words is "twenty-eight billion, eighty-one million, eight hundred two thousand, three hundred thirteen".