28813969556 has 12 divisors (see below), whose sum is σ = 50426181792. Its totient is φ = 14406489048.

The previous prime is 28813969523. The next prime is 28813969603. The reversal of 28813969556 is 65596931882.

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, 27371 + ... + 241613.

It is an arithmetic number, because the mean of its divisors is an integer number (4202181816).

Almost surely, 2^28813969556 is an apocalyptic number.

It is an amenable number.

28813969556 is a deficient number, since it is larger than the sum of its proper divisors (21612212236).

28813969556 is a wasteful number, since it uses less digits than its factorization.

28813969556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247870 (or 247868 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 62.

The spelling of 28813969556 in words is "twenty-eight billion, eight hundred thirteen million, nine hundred sixty-nine thousand, five hundred fifty-six".