26479989 has 6 divisors (see below), whose sum is σ = 38248886. Its totient is φ = 17653320.

The previous prime is 26479979. The next prime is 26479991. The reversal of 26479989 is 98997462.

It can be written as a sum of positive squares in only one way, i.e., 24354225 + 2125764 = 4935^2 + 1458^2 .

It is not a de Polignac number, because 26479989 - 2⁷ = 26479861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26479909) 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, 1471102 + ... + 1471119.

Almost surely, 2^26479989 is an apocalyptic number.

It is an amenable number.

26479989 is a deficient number, since it is larger than the sum of its proper divisors (11768897).

26479989 is a wasteful number, since it uses less digits than its factorization.

26479989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942227 (or 2942224 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 26479989 is about 5145.8710632895. The cubic root of 26479989 is about 298.0615348205.

The spelling of 26479989 in words is "twenty-six million, four hundred seventy-nine thousand, nine hundred eighty-nine".