28158043268 has 12 divisors (see below), whose sum is σ = 49281896412. Its totient is φ = 14077501440.

The previous prime is 28158043253. The next prime is 28158043271. The reversal of 28158043268 is 86234085182.

It can be written as a sum of positive squares in 2 ways, for example, as 16700909824 + 11457133444 = 129232^2 + 107038^2 .

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, 337853 + ... + 412868.

It is an arithmetic number, because the mean of its divisors is an integer number (4106824701).

Almost surely, 2^28158043268 is an apocalyptic number.

It is an amenable number.

28158043268 is a deficient number, since it is larger than the sum of its proper divisors (21123853144).

28158043268 is a wasteful number, since it uses less digits than its factorization.

28158043268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760102 (or 760100 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 28158043268 in words is "twenty-eight billion, one hundred fifty-eight million, forty-three thousand, two hundred sixty-eight".