26289664 has 20 divisors (see below), whose sum is σ = 52529004. Its totient is φ = 13144576.

The previous prime is 26289649. The next prime is 26289671. The reversal of 26289664 is 46698262.

It is a super-2 number, since 2×26289664² = 1382292866465792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26289664.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25162 + ... + 26185.

Almost surely, 2^26289664 is an apocalyptic number.

It is an amenable number.

26289664 is a deficient number, since it is larger than the sum of its proper divisors (26239340).

26289664 is an frugal number, since it uses more digits than its factorization.

26289664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51365 (or 51349 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 26289664 is about 5127.3447319251. The cubic root of 26289664 is about 297.3457110190.

The spelling of 26289664 in words is "twenty-six million, two hundred eighty-nine thousand, six hundred sixty-four".