28677589 has 8 divisors (see below), whose sum is σ = 30411288. Its totient is φ = 26949120.

The previous prime is 28677587. The next prime is 28677601. The reversal of 28677589 is 98577682.

It can be written as a sum of positive squares in 4 ways, for example, as 16892100 + 11785489 = 4110^2 + 3433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28677589 - 2¹ = 28677587 is a prime.

It is a super-2 number, since 2×28677589² = 1644808221705842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28677581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21049 + ... + 22369.

It is an arithmetic number, because the mean of its divisors is an integer number (3801411).

Almost surely, 2^28677589 is an apocalyptic number.

It is an amenable number.

28677589 is a deficient number, since it is larger than the sum of its proper divisors (1733699).

28677589 is a wasteful number, since it uses less digits than its factorization.

28677589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its digits is 1693440, while the sum is 52.

The square root of 28677589 is about 5355.1460297549. The cubic root of 28677589 is about 306.0888751769.

The spelling of 28677589 in words is "twenty-eight million, six hundred seventy-seven thousand, five hundred eighty-nine".