26413640 has 64 divisors (see below), whose sum is σ = 65396160. Its totient is φ = 9521920.

The previous prime is 26413627. The next prime is 26413649. The reversal of 26413640 is 4631462.

It is not an unprimeable number, because it can be changed into a prime (26413649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75947 + ... + 76293.

It is an arithmetic number, because the mean of its divisors is an integer number (1021815).

Almost surely, 2^26413640 is an apocalyptic number.

26413640 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 26413640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32698080).

26413640 is an abundant number, since it is smaller than the sum of its proper divisors (38982520).

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

26413640 is a wasteful number, since it uses less digits than its factorization.

26413640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 26413640 is about 5139.4202007619. The cubic root of 26413640 is about 297.8123828417.

The spelling of 26413640 in words is "twenty-six million, four hundred thirteen thousand, six hundred forty".