26945664 has 64 divisors (see below), whose sum is σ = 73146240. Its totient is φ = 8784896.

The previous prime is 26945647. The next prime is 26945671. The reversal of 26945664 is 46654962.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17302 + ... + 18794.

It is an arithmetic number, because the mean of its divisors is an integer number (1142910).

Almost surely, 2^26945664 is an apocalyptic number.

26945664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26945664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36573120).

26945664 is an abundant number, since it is smaller than the sum of its proper divisors (46200576).

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

26945664 is a wasteful number, since it uses less digits than its factorization.

26945664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557 (or 1545 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 26945664 is about 5190.9213055102. The cubic root of 26945664 is about 299.7986204067.

The spelling of 26945664 in words is "twenty-six million, nine hundred forty-five thousand, six hundred sixty-four".