28081657112 has 32 divisors (see below), whose sum is σ = 53006017680. Its totient is φ = 13947024000.

The previous prime is 28081657081. The next prime is 28081657133. The reversal of 28081657112 is 21175618082.

It is a self number, because there is not a number n which added to its sum of digits gives 28081657112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730238 + ... + 767730.

Almost surely, 2^28081657112 is an apocalyptic number.

It is an amenable number.

28081657112 is a deficient number, since it is larger than the sum of its proper divisors (24924360568).

28081657112 is a wasteful number, since it uses less digits than its factorization.

28081657112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38123 (or 38119 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 28081657112 in words is "twenty-eight billion, eighty-one million, six hundred fifty-seven thousand, one hundred twelve".