26339640 has 64 divisors (see below), whose sum is σ = 79488000. Its totient is φ = 6982272.

The previous prime is 26339633. The next prime is 26339683. The reversal of 26339640 is 4693362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23329 + ... + 24431.

It is an arithmetic number, because the mean of its divisors is an integer number (1242000).

Almost surely, 2^26339640 is an apocalyptic number.

26339640 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 26339640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39744000).

26339640 is an abundant number, since it is smaller than the sum of its proper divisors (53148360).

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

26339640 is a wasteful number, since it uses less digits than its factorization.

26339640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 26339640 is about 5132.2158956926. The cubic root of 26339640 is about 297.5340073640.

It can be divided in two parts, 263 and 39640, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 26339640 in words is "twenty-six million, three hundred thirty-nine thousand, six hundred forty".