11643438 has 8 divisors (see below), whose sum is σ = 23286888. Its totient is φ = 3881144.

The previous prime is 11643431. The next prime is 11643449. The reversal of 11643438 is 83434611.

11643438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

11643438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 970281 + ... + 970292.

It is an arithmetic number, because the mean of its divisors is an integer number (2910861).

Almost surely, 2^11643438 is an apocalyptic number.

11643438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11643438 is a wasteful number, since it uses less digits than its factorization.

11643438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940578.

The product of its digits is 6912, while the sum is 30.

The square root of 11643438 is about 3412.2482324708. The cubic root of 11643438 is about 226.6524467242.

The spelling of 11643438 in words is "eleven million, six hundred forty-three thousand, four hundred thirty-eight".