26326640 has 20 divisors (see below), whose sum is σ = 61209624. Its totient is φ = 10530624.

The previous prime is 26326639. The next prime is 26326679. The reversal of 26326640 is 4662362.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164462 + ... + 164621.

Almost surely, 2^26326640 is an apocalyptic number.

26326640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26326640 is an abundant number, since it is smaller than the sum of its proper divisors (34882984).

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

26326640 is a wasteful number, since it uses less digits than its factorization.

26326640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329096 (or 329090 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 26326640 is about 5130.9492299184. The cubic root of 26326640 is about 297.4850497395.

The spelling of 26326640 in words is "twenty-six million, three hundred twenty-six thousand, six hundred forty".