28186689260 has 12 divisors (see below), whose sum is σ = 59192047488. Its totient is φ = 11274675696.

The previous prime is 28186689257. The next prime is 28186689337. The reversal of 28186689260 is 6298668182.

It is a junction number, because it is equal to n+sod(n) for n = 28186689196 and 28186689205.

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, 704667212 + ... + 704667251.

It is an arithmetic number, because the mean of its divisors is an integer number (4932670624).

Almost surely, 2^28186689260 is an apocalyptic number.

28186689260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28186689260 is an abundant number, since it is smaller than the sum of its proper divisors (31005358228).

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

28186689260 is a wasteful number, since it uses less digits than its factorization.

28186689260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409334472 (or 1409334470 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 28186689260 in words is "twenty-eight billion, one hundred eighty-six million, six hundred eighty-nine thousand, two hundred sixty".