28989873 has 16 divisors (see below), whose sum is σ = 46852800. Its totient is φ = 17569440.

The previous prime is 28989847. The next prime is 28989889. The reversal of 28989873 is 37898982.

It is not a de Polignac number, because 28989873 - 2⁵ = 28989841 is a prime.

It is a super-2 number, since 2×28989873² = 1680825473112258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28989673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48508 + ... + 49101.

It is an arithmetic number, because the mean of its divisors is an integer number (2928300).

Almost surely, 2^28989873 is an apocalyptic number.

It is an amenable number.

28989873 is a deficient number, since it is larger than the sum of its proper divisors (17862927).

28989873 is a wasteful number, since it uses less digits than its factorization.

28989873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97629 (or 97623 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 28989873 is about 5384.2244566883. The cubic root of 28989873 is about 307.1959159308.

The spelling of 28989873 in words is "twenty-eight million, nine hundred eighty-nine thousand, eight hundred seventy-three".