28956717686 has 8 divisors (see below), whose sum is σ = 46776236304. Its totient is φ = 13364638920.

The previous prime is 28956717641. The next prime is 28956717697. The reversal of 28956717686 is 68671765982.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 556859930 + ... + 556859981.

It is an arithmetic number, because the mean of its divisors is an integer number (5847029538).

Almost surely, 2^28956717686 is an apocalyptic number.

28956717686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28956717686 is a deficient number, since it is larger than the sum of its proper divisors (17819518618).

28956717686 is a wasteful number, since it uses less digits than its factorization.

28956717686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113719926.

The product of its digits is 60963840, while the sum is 65.

The spelling of 28956717686 in words is "twenty-eight billion, nine hundred fifty-six million, seven hundred seventeen thousand, six hundred eighty-six".