28591859136 has 28 divisors (see below), whose sum is σ = 75649294472. Its totient is φ = 9530619648.

The previous prime is 28591859089. The next prime is 28591859137. The reversal of 28591859136 is 63195819582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28591859137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74457775 + ... + 74458158.

Almost surely, 2^28591859136 is an apocalyptic number.

It is an amenable number.

28591859136 is an abundant number, since it is smaller than the sum of its proper divisors (47057435336).

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

28591859136 is a wasteful number, since it uses less digits than its factorization.

28591859136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148915948 (or 148915938 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 57.

The spelling of 28591859136 in words is "twenty-eight billion, five hundred ninety-one million, eight hundred fifty-nine thousand, one hundred thirty-six".