26640868 has 6 divisors (see below), whose sum is σ = 46621526. Its totient is φ = 13320432.

The previous prime is 26640829. The next prime is 26640893. The reversal of 26640868 is 86804662.

It can be written as a sum of positive squares in only one way, i.e., 26440164 + 200704 = 5142^2 + 448^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 26640868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330105 + ... + 3330112.

Almost surely, 2^26640868 is an apocalyptic number.

It is an amenable number.

26640868 is a deficient number, since it is larger than the sum of its proper divisors (19980658).

26640868 is a wasteful number, since it uses less digits than its factorization.

26640868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660221 (or 6660219 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 26640868 is about 5161.4792453327. The cubic root of 26640868 is about 298.6639401280.

The spelling of 26640868 in words is "twenty-six million, six hundred forty thousand, eight hundred sixty-eight".