28894869351 has 12 divisors (see below), whose sum is σ = 42755010480. Its totient is φ = 18793410720.

The previous prime is 28894869319. The next prime is 28894869359. The reversal of 28894869351 is 15396849882.

28894869351 is a `hidden beast` number, since 28 + 89 + 486 + 9 + 3 + 51 = 666.

It is not a de Polignac number, because 28894869351 - 2⁵ = 28894869319 is a prime.

It is a super-2 number, since 2×28894869351² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28894869359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39152571 + ... + 39153308.

It is an arithmetic number, because the mean of its divisors is an integer number (3562917540).

Almost surely, 2^28894869351 is an apocalyptic number.

28894869351 is a deficient number, since it is larger than the sum of its proper divisors (13860141129).

28894869351 is a wasteful number, since it uses less digits than its factorization.

28894869351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78305926 (or 78305923 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 28894869351 in words is "twenty-eight billion, eight hundred ninety-four million, eight hundred sixty-nine thousand, three hundred fifty-one".