28491517386 has 48 divisors (see below), whose sum is σ = 64287025920. Its totient is φ = 9109457280.

The previous prime is 28491517349. The next prime is 28491517391. The reversal of 28491517386 is 68371519482.

28491517386 is a `hidden beast` number, since 2 + 8 + 4 + 91 + 517 + 38 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162876 + ... + 288983.

It is an arithmetic number, because the mean of its divisors is an integer number (1339313040).

Almost surely, 2^28491517386 is an apocalyptic number.

28491517386 is an abundant number, since it is smaller than the sum of its proper divisors (35795508534).

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

28491517386 is a wasteful number, since it uses less digits than its factorization.

28491517386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452011 (or 452008 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 28491517386 in words is "twenty-eight billion, four hundred ninety-one million, five hundred seventeen thousand, three hundred eighty-six".