28846989 has 8 divisors (see below), whose sum is σ = 42736320. Its totient is φ = 19231308.

The previous prime is 28846969. The next prime is 28847003. The reversal of 28846989 is 98964882.

It is not a de Polignac number, because 28846989 - 2¹⁶ = 28781453 is a prime.

It is a super-2 number, since 2×28846989² = 1664297548732242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28846969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534177 + ... + 534230.

It is an arithmetic number, because the mean of its divisors is an integer number (5342040).

Almost surely, 2^28846989 is an apocalyptic number.

It is an amenable number.

28846989 is a deficient number, since it is larger than the sum of its proper divisors (13889331).

28846989 is a wasteful number, since it uses less digits than its factorization.

28846989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068416 (or 1068410 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 28846989 is about 5370.9393033249. The cubic root of 28846989 is about 306.6903866078.

The spelling of 28846989 in words is "twenty-eight million, eight hundred forty-six thousand, nine hundred eighty-nine".