28309143164 has 12 divisors (see below), whose sum is σ = 49716059064. Its totient is φ = 14104554864.

The previous prime is 28309143151. The next prime is 28309143173. The reversal of 28309143164 is 46134190382.

It is a congruent number.

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, 12502907 + ... + 12505170.

It is an arithmetic number, because the mean of its divisors is an integer number (4143004922).

Almost surely, 2^28309143164 is an apocalyptic number.

It is an amenable number.

28309143164 is a deficient number, since it is larger than the sum of its proper divisors (21406915900).

28309143164 is a wasteful number, since it uses less digits than its factorization.

28309143164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25008364 (or 25008362 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 28309143164 in words is "twenty-eight billion, three hundred nine million, one hundred forty-three thousand, one hundred sixty-four".