28956123016 has 32 divisors (see below), whose sum is σ = 55010340000. Its totient is φ = 14287102720.

The previous prime is 28956123011. The next prime is 28956123041. The reversal of 28956123016 is 61032165982.

It is not an unprimeable number, because it can be changed into a prime (28956123011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560235 + ... + 609733.

It is an arithmetic number, because the mean of its divisors is an integer number (1719073125).

Almost surely, 2^28956123016 is an apocalyptic number.

It is an amenable number.

28956123016 is a deficient number, since it is larger than the sum of its proper divisors (26054216984).

28956123016 is a wasteful number, since it uses less digits than its factorization.

28956123016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50469 (or 50465 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

Adding to 28956123016 its reverse (61032165982), we get a palindrome (89988288998).

The spelling of 28956123016 in words is "twenty-eight billion, nine hundred fifty-six million, one hundred twenty-three thousand, sixteen".