26830989 has 6 divisors (see below), whose sum is σ = 38755886. Its totient is φ = 17887320.

The previous prime is 26830967. The next prime is 26831023. The reversal of 26830989 is 98903862.

26830989 is a `hidden beast` number, since 268 + 309 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 514089 = 5130^2 + 717^2 .

It is not a de Polignac number, because 26830989 - 2⁷ = 26830861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26830939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1490602 + ... + 1490619.

Almost surely, 2^26830989 is an apocalyptic number.

It is an amenable number.

26830989 is a deficient number, since it is larger than the sum of its proper divisors (11924897).

26830989 is a wasteful number, since it uses less digits than its factorization.

26830989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981227 (or 2981224 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 26830989 is about 5179.8638012983. The cubic root of 26830989 is about 299.3727226579.

The spelling of 26830989 in words is "twenty-six million, eight hundred thirty thousand, nine hundred eighty-nine".