28807647128 has 32 divisors (see below), whose sum is σ = 58179797760. Its totient is φ = 13293434880.

The previous prime is 28807647103. The next prime is 28807647133. The reversal of 28807647128 is 82174670882.

It is a self number, because there is not a number n which added to its sum of digits gives 28807647128.

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, 637193 + ... + 680903.

It is an arithmetic number, because the mean of its divisors is an integer number (1818118680).

Almost surely, 2^28807647128 is an apocalyptic number.

It is an amenable number.

28807647128 is an abundant number, since it is smaller than the sum of its proper divisors (29372150632).

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

28807647128 is a wasteful number, since it uses less digits than its factorization.

28807647128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50067 (or 50063 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 53.

The spelling of 28807647128 in words is "twenty-eight billion, eight hundred seven million, six hundred forty-seven thousand, one hundred twenty-eight".