28115473866 has 32 divisors (see below), whose sum is σ = 56838345408. Its totient is φ = 9270844800.

The previous prime is 28115473849. The next prime is 28115473873. The reversal of 28115473866 is 66837451182.

It is a super-4 number, since 4×28115473866⁴ (a number of 43 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418806 + ... + 481278.

It is an arithmetic number, because the mean of its divisors is an integer number (1776198294).

Almost surely, 2^28115473866 is an apocalyptic number.

28115473866 is an abundant number, since it is smaller than the sum of its proper divisors (28722871542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28115473866 is a wasteful number, since it uses less digits than its factorization.

28115473866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63286.

The product of its digits is 1935360, while the sum is 51.

The spelling of 28115473866 in words is "twenty-eight billion, one hundred fifteen million, four hundred seventy-three thousand, eight hundred sixty-six".