26840664 has 48 divisors (see below), whose sum is σ = 73359000. Its totient is φ = 8865024.

The previous prime is 26840663. The next prime is 26840717. The reversal of 26840664 is 46604862.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26840663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6487 + ... + 9785.

Almost surely, 2^26840664 is an apocalyptic number.

26840664 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 26840664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36679500).

26840664 is an abundant number, since it is smaller than the sum of its proper divisors (46518336).

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

26840664 is a wasteful number, since it uses less digits than its factorization.

26840664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424 (or 3417 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 26840664 is about 5180.7976219883. The cubic root of 26840664 is about 299.4087019879.

The spelling of 26840664 in words is "twenty-six million, eight hundred forty thousand, six hundred sixty-four".