28738512156 has 48 divisors (see below), whose sum is σ = 68639648000. Its totient is φ = 9353498112.

The previous prime is 28738512109. The next prime is 28738512203. The reversal of 28738512156 is 65121583782.

It is an interprime number because it is at equal distance from previous prime (28738512109) and next prime (28738512203).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1828620 + ... + 1844268.

Almost surely, 2^28738512156 is an apocalyptic number.

It is an amenable number.

28738512156 is an abundant number, since it is smaller than the sum of its proper divisors (39901135844).

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

28738512156 is a wasteful number, since it uses less digits than its factorization.

28738512156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19258 (or 19256 counting only the distinct ones).

The product of its digits is 806400, while the sum is 48.

The spelling of 28738512156 in words is "twenty-eight billion, seven hundred thirty-eight million, five hundred twelve thousand, one hundred fifty-six".