28321808694 has 32 divisors (see below), whose sum is σ = 57463499520. Its totient is φ = 9304058400.

The previous prime is 28321808689. The next prime is 28321808729. The reversal of 28321808694 is 49680812382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240704 + ... + 1263324.

It is an arithmetic number, because the mean of its divisors is an integer number (1795734360).

Almost surely, 2^28321808694 is an apocalyptic number.

28321808694 is an abundant number, since it is smaller than the sum of its proper divisors (29141690826).

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

28321808694 is a wasteful number, since it uses less digits than its factorization.

28321808694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25636.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 28321808694 in words is "twenty-eight billion, three hundred twenty-one million, eight hundred eight thousand, six hundred ninety-four".