28068903844 has 12 divisors (see below), whose sum is σ = 50814395100. Its totient is φ = 13550505248.

The previous prime is 28068903809. The next prime is 28068903853. The reversal of 28068903844 is 44830986082.

It can be written as a sum of positive squares in 2 ways, for example, as 9833102244 + 18235801600 = 99162^2 + 135040^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28068903791 and 28068903800.

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, 120986539 + ... + 120986770.

It is an arithmetic number, because the mean of its divisors is an integer number (4234532925).

Almost surely, 2^28068903844 is an apocalyptic number.

It is an amenable number.

28068903844 is a deficient number, since it is larger than the sum of its proper divisors (22745491256).

28068903844 is a wasteful number, since it uses less digits than its factorization.

28068903844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241973342 (or 241973340 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 28068903844 in words is "twenty-eight billion, sixty-eight million, nine hundred three thousand, eight hundred forty-four".