28390847265 has 24 divisors (see below), whose sum is σ = 53684512128. Its totient is φ = 13765259040.

The previous prime is 28390847201. The next prime is 28390847279. The reversal of 28390847265 is 56274809382.

28390847265 is a `hidden beast` number, since 2 + 83 + 90 + 8 + 472 + 6 + 5 = 666.

It is not a de Polignac number, because 28390847265 - 2⁶ = 28390847201 is a prime.

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, 28677129 + ... + 28678118.

It is an arithmetic number, because the mean of its divisors is an integer number (2236854672).

Almost surely, 2^28390847265 is an apocalyptic number.

It is an amenable number.

28390847265 is a deficient number, since it is larger than the sum of its proper divisors (25293664863).

28390847265 is a wasteful number, since it uses less digits than its factorization.

28390847265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57355269 (or 57355266 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 28390847265 in words is "twenty-eight billion, three hundred ninety million, eight hundred forty-seven thousand, two hundred sixty-five".