11726840 has 32 divisors (see below), whose sum is σ = 26838000. Its totient is φ = 4610304.

The previous prime is 11726783. The next prime is 11726843. The reversal of 11726840 is 4862711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11726843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125 + ... + 4844.

Almost surely, 2^11726840 is an apocalyptic number.

11726840 is a gapful number since it is divisible by the number (10) 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 11726840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13419000).

11726840 is an abundant number, since it is smaller than the sum of its proper divisors (15111160).

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

11726840 is a wasteful number, since it uses less digits than its factorization.

11726840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039 (or 5035 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 11726840 is about 3424.4474006765. The cubic root of 11726840 is about 227.1923305452.

The spelling of 11726840 in words is "eleven million, seven hundred twenty-six thousand, eight hundred forty".