28569469928 has 16 divisors (see below), whose sum is σ = 56387112000. Its totient is φ = 13532906736.

The previous prime is 28569469927. The next prime is 28569469937. The reversal of 28569469928 is 82996496582.

It is a super-2 number, since 2×28569469928² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28569469921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93978368 + ... + 93978671.

It is an arithmetic number, because the mean of its divisors is an integer number (3524194500).

Almost surely, 2^28569469928 is an apocalyptic number.

It is an amenable number.

28569469928 is a deficient number, since it is larger than the sum of its proper divisors (27817642072).

28569469928 is a wasteful number, since it uses less digits than its factorization.

28569469928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187957064 (or 187957060 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 68.

The spelling of 28569469928 in words is "twenty-eight billion, five hundred sixty-nine million, four hundred sixty-nine thousand, nine hundred twenty-eight".