11401638 has 8 divisors (see below), whose sum is σ = 22803288. Its totient is φ = 3800544.

The previous prime is 11401613. The next prime is 11401639. The reversal of 11401638 is 83610411.

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

11401638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11401639) 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, 950131 + ... + 950142.

It is an arithmetic number, because the mean of its divisors is an integer number (2850411).

Almost surely, 2^11401638 is an apocalyptic number.

11401638 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.

11401638 is a wasteful number, since it uses less digits than its factorization.

11401638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900278.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 11401638 is about 3376.6311613796. The cubic root of 11401638 is about 225.0724902229.

The spelling of 11401638 in words is "eleven million, four hundred one thousand, six hundred thirty-eight".