28897324908 has 12 divisors (see below), whose sum is σ = 67427091480. Its totient is φ = 9632441632.

The previous prime is 28897324889. The next prime is 28897324969. The reversal of 28897324908 is 80942379882.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1204055193 + ... + 1204055216.

It is an arithmetic number, because the mean of its divisors is an integer number (5618924290).

Almost surely, 2^28897324908 is an apocalyptic number.

It is an amenable number.

28897324908 is an abundant number, since it is smaller than the sum of its proper divisors (38529766572).

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

28897324908 is a wasteful number, since it uses less digits than its factorization.

28897324908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408110416 (or 2408110414 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 28897324908 in words is "twenty-eight billion, eight hundred ninety-seven million, three hundred twenty-four thousand, nine hundred eight".