28297295278 has 24 divisors (see below), whose sum is σ = 51522674832. Its totient is φ = 11600132544.

The previous prime is 28297295263. The next prime is 28297295281. The reversal of 28297295278 is 87259279282.

28297295278 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6274875 + ... + 6279382.

It is an arithmetic number, because the mean of its divisors is an integer number (2146778118).

Almost surely, 2^28297295278 is an apocalyptic number.

28297295278 is a deficient number, since it is larger than the sum of its proper divisors (23225379554).

28297295278 is a wasteful number, since it uses less digits than its factorization.

28297295278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12554296 (or 12554289 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 61.

The spelling of 28297295278 in words is "twenty-eight billion, two hundred ninety-seven million, two hundred ninety-five thousand, two hundred seventy-eight".