26863489 has 9 divisors (see below), whose sum is σ = 27625539. Its totient is φ = 26122320.

The previous prime is 26863481. The next prime is 26863513. The reversal of 26863489 is 98436862.

It is a happy number.

The square root of 26863489 is 5183.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15249025 + 11614464 = 3905^2 + 3408^2 .

It is not a de Polignac number, because 26863489 - 2³ = 26863481 is a prime.

It is a Duffinian number.

Its product of digits (497664) is a multiple of the sum of its prime divisors (144).

It is not an unprimeable number, because it can be changed into a prime (26863481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 367957 + ... + 368029.

Almost surely, 2^26863489 is an apocalyptic number.

26863489 is the 5183-rd square number.

26863489 is the 2592-nd centered octagonal number.

It is an amenable number.

26863489 is a deficient number, since it is larger than the sum of its proper divisors (762050).

26863489 is an frugal number, since it uses more digits than its factorization.

26863489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 144 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The cubic root of 26863489 is about 299.4935492101.

The spelling of 26863489 in words is "twenty-six million, eight hundred sixty-three thousand, four hundred eighty-nine".