28851457689 has 32 divisors (see below), whose sum is σ = 43391508480. Its totient is φ = 18943016400.

The previous prime is 28851457681. The next prime is 28851457703. The reversal of 28851457689 is 98675415882.

28851457689 is a `hidden beast` number, since 2 + 8 + 8 + 51 + 4 + 576 + 8 + 9 = 666.

It is not a de Polignac number, because 28851457689 - 2³ = 28851457681 is a prime.

It is a super-2 number, since 2×28851457689² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28851457681) 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, 1892154 + ... + 1907340.

It is an arithmetic number, because the mean of its divisors is an integer number (1355984640).

Almost surely, 2^28851457689 is an apocalyptic number.

It is an amenable number.

28851457689 is a deficient number, since it is larger than the sum of its proper divisors (14540050791).

28851457689 is a wasteful number, since it uses less digits than its factorization.

28851457689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16258 (or 16252 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 63.

The spelling of 28851457689 in words is "twenty-eight billion, eight hundred fifty-one million, four hundred fifty-seven thousand, six hundred eighty-nine".