28897796735 has 24 divisors (see below), whose sum is σ = 36865236240. Its totient is φ = 21738180992.

The previous prime is 28897796729. The next prime is 28897796743. The reversal of 28897796735 is 53769779882.

It is not a de Polignac number, because 28897796735 - 2²² = 28893602431 is a prime.

It is a super-2 number, since 2×28897796735² (a number of 22 digits) contains 22 as substring.

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, 63467 + ... + 248643.

It is an arithmetic number, because the mean of its divisors is an integer number (1536051510).

Almost surely, 2^28897796735 is an apocalyptic number.

28897796735 is a deficient number, since it is larger than the sum of its proper divisors (7967439505).

28897796735 is a wasteful number, since it uses less digits than its factorization.

28897796735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185287 (or 185264 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 71.

The spelling of 28897796735 in words is "twenty-eight billion, eight hundred ninety-seven million, seven hundred ninety-six thousand, seven hundred thirty-five".