28916589 has 16 divisors (see below), whose sum is σ = 43327872. Its totient is φ = 17020608.

The previous prime is 28916581. The next prime is 28916593. The reversal of 28916589 is 98561982.

It is a happy number.

It is not a de Polignac number, because 28916589 - 2³ = 28916581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916581) 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, 15222 + ... + 17015.

It is an arithmetic number, because the mean of its divisors is an integer number (2707992).

Almost surely, 2^28916589 is an apocalyptic number.

It is an amenable number.

28916589 is a deficient number, since it is larger than the sum of its proper divisors (14411283).

28916589 is a wasteful number, since it uses less digits than its factorization.

28916589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32276.

The product of its digits is 311040, while the sum is 48.

The square root of 28916589 is about 5377.4147134102. The cubic root of 28916589 is about 306.9368422175.

The spelling of 28916589 in words is "twenty-eight million, nine hundred sixteen thousand, five hundred eighty-nine".