26330640 has 120 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 6015744.

The previous prime is 26330639. The next prime is 26330641. The reversal of 26330640 is 4603362.

It is an interprime number because it is at equal distance from previous prime (26330639) and next prime (26330641).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 26330640.

It is not an unprimeable number, because it can be changed into a prime (26330641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10641 + ... + 12879.

It is an arithmetic number, because the mean of its divisors is an integer number (791616).

Almost surely, 2^26330640 is an apocalyptic number.

26330640 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 26330640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47496960).

26330640 is an abundant number, since it is smaller than the sum of its proper divisors (68663280).

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

26330640 is a wasteful number, since it uses less digits than its factorization.

26330640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2256 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 26330640 is about 5131.3390065362. The cubic root of 26330640 is about 297.5001153402.

It can be divided in two parts, 263 and 30640, that added together give a palindrome (30903).

The spelling of 26330640 in words is "twenty-six million, three hundred thirty thousand, six hundred forty".