28231287208 has 32 divisors (see below), whose sum is σ = 53485790400. Its totient is φ = 13969157632.

The previous prime is 28231287193. The next prime is 28231287229. The reversal of 28231287208 is 80278213282.

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, 256728 + ... + 349816.

It is an arithmetic number, because the mean of its divisors is an integer number (1671430950).

Almost surely, 2^28231287208 is an apocalyptic number.

It is an amenable number.

28231287208 is a deficient number, since it is larger than the sum of its proper divisors (25254503192).

28231287208 is a wasteful number, since it uses less digits than its factorization.

28231287208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93489 (or 93485 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 28231287208 in words is "twenty-eight billion, two hundred thirty-one million, two hundred eighty-seven thousand, two hundred eight".