26988564 has 24 divisors (see below), whose sum is σ = 63077728. Its totient is φ = 8981280.

The previous prime is 26988557. The next prime is 26988583. The reversal of 26988564 is 46588962.

It is a happy number.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 7599 + ... + 10569.

Almost surely, 2^26988564 is an apocalyptic number.

It is an amenable number.

26988564 is an abundant number, since it is smaller than the sum of its proper divisors (36089164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26988564 is a wasteful number, since it uses less digits than its factorization.

26988564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735 (or 3733 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 26988564 is about 5195.0518765456. The cubic root of 26988564 is about 299.9576384631.

The spelling of 26988564 in words is "twenty-six million, nine hundred eighty-eight thousand, five hundred sixty-four".