28076858164 has 12 divisors (see below), whose sum is σ = 52024766724.
Its totient is φ = 13212639104.
The previous prime is 28076858153. The next prime is 28076858177. The reversal of 28076858164 is 46185867082.
It can be written as a sum of positive squares in 2 ways, for example, as 13377235600 + 14699622564 = 115660^2 + 121242^2
It is a super-2 number, since 2×280768581642 (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 3 ways as a sum of consecutive naturals, for example, 206447419 + ... + 206447554.
It is an arithmetic number, because the mean of its divisors is an integer number (4335397227).
Almost surely, 228076858164 is an apocalyptic number.
It is an amenable number.
28076858164 is a deficient number, since it is larger than the sum of its proper divisors (23947908560).
28076858164 is a wasteful number, since it uses less digits than its factorization.
28076858164 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 412894994 (or 412894992 counting only the distinct ones).
The product of its (nonzero) digits is 5160960, while the sum is 55.
The spelling of 28076858164 in words is "twenty-eight billion, seventy-six million, eight hundred fifty-eight thousand, one hundred sixty-four".