26985664 has 42 divisors (see below), whose sum is σ = 56923940. Its totient is φ = 12690432.

The previous prime is 26985659. The next prime is 26985677. The reversal of 26985664 is 46658962.

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 5 ways as a sum of consecutive naturals, for example, 17767 + ... + 19225.

Almost surely, 2^26985664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26985664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28461970).

26985664 is an abundant number, since it is smaller than the sum of its proper divisors (29938276).

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

26985664 is a wasteful number, since it uses less digits than its factorization.

26985664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505 (or 1478 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The square root of 26985664 is about 5194.7727573013. The cubic root of 26985664 is about 299.9468943035.

The spelling of 26985664 in words is "twenty-six million, nine hundred eighty-five thousand, six hundred sixty-four".