11978589 has 20 divisors (see below), whose sum is σ = 18643456. Its totient is φ = 6840792.

The previous prime is 11978587. The next prime is 11978609. The reversal of 11978589 is 98587911.

It is not a de Polignac number, because 11978589 - 2¹ = 11978587 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 (11978581) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6372 + ... + 8034.

Almost surely, 2^11978589 is an apocalyptic number.

It is an amenable number.

11978589 is a deficient number, since it is larger than the sum of its proper divisors (6664867).

11978589 is an frugal number, since it uses more digits than its factorization.

11978589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1673 counting only the distinct ones).

The product of its digits is 181440, while the sum is 48.

The square root of 11978589 is about 3461.0098237364. The cubic root of 11978589 is about 228.8066036877.

The spelling of 11978589 in words is "eleven million, nine hundred seventy-eight thousand, five hundred eighty-nine".