26064640 has 72 divisors (see below), whose sum is σ = 71376480. Its totient is φ = 8933376.

The previous prime is 26064601. The next prime is 26064659. The reversal of 26064640 is 4646062.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 26064599 and 26064608.

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, 7506 + ... + 10414.

It is an arithmetic number, because the mean of its divisors is an integer number (991340).

Almost surely, 2^26064640 is an apocalyptic number.

26064640 is a gapful number since it is divisible by the number (20) 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 26064640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35688240).

26064640 is an abundant number, since it is smaller than the sum of its proper divisors (45311840).

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

26064640 is an equidigital number, since it uses as much as digits as its factorization.

26064640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937 (or 2923 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 26064640 is about 5105.3540523650. The cubic root of 26064640 is about 296.4949110314.

The spelling of 26064640 in words is "twenty-six million, sixty-four thousand, six hundred forty".