11578489 has 4 divisors (see below), whose sum is σ = 12469156. Its totient is φ = 10687824.

The previous prime is 11578487. The next prime is 11578493. The reversal of 11578489 is 98487511.

It is a happy number.

11578489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98487511 = 17 ⋅5793383.

It can be written as a sum of positive squares in 2 ways, for example, as 6325225 + 5253264 = 2515^2 + 2292^2 .

It is a cyclic number.

It is not a de Polignac number, because 11578489 - 2¹ = 11578487 is a prime.

It is a super-2 number, since 2×11578489² = 268122815046242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11578487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445314 + ... + 445339.

It is an arithmetic number, because the mean of its divisors is an integer number (3117289).

Almost surely, 2^11578489 is an apocalyptic number.

It is an amenable number.

11578489 is a deficient number, since it is larger than the sum of its proper divisors (890667).

11578489 is an equidigital number, since it uses as much as digits as its factorization.

11578489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890666.

The product of its digits is 80640, while the sum is 43.

The square root of 11578489 is about 3402.7178842802. The cubic root of 11578489 is about 226.2302258798.

The spelling of 11578489 in words is "eleven million, five hundred seventy-eight thousand, four hundred eighty-nine".