28956134769 has 32 divisors (see below), whose sum is σ = 40683371520. Its totient is φ = 18296010432.

The previous prime is 28956134743. The next prime is 28956134771. The reversal of 28956134769 is 96743165982.

It is not a de Polignac number, because 28956134769 - 2⁵ = 28956134737 is a prime.

It is a super-3 number, since 3×28956134769³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28956134369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1800964 + ... + 1816970.

It is an arithmetic number, because the mean of its divisors is an integer number (1271355360).

Almost surely, 2^28956134769 is an apocalyptic number.

It is an amenable number.

28956134769 is a deficient number, since it is larger than the sum of its proper divisors (11727236751).

28956134769 is a wasteful number, since it uses less digits than its factorization.

28956134769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16469.

The product of its digits is 19595520, while the sum is 60.

The spelling of 28956134769 in words is "twenty-eight billion, nine hundred fifty-six million, one hundred thirty-four thousand, seven hundred sixty-nine".