11788638 has 8 divisors (see below), whose sum is σ = 23577288. Its totient is φ = 3929544.

The previous prime is 11788591. The next prime is 11788639. The reversal of 11788638 is 83688711.

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

11788638 is an admirable number.

It is a super-3 number, since 3×11788638³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 11788638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11788639) 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, 982381 + ... + 982392.

It is an arithmetic number, because the mean of its divisors is an integer number (2947161).

Almost surely, 2^11788638 is an apocalyptic number.

11788638 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.

11788638 is a wasteful number, since it uses less digits than its factorization.

11788638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964778.

The product of its digits is 64512, while the sum is 42.

The square root of 11788638 is about 3433.4586061288. The cubic root of 11788638 is about 227.5907169509.

The spelling of 11788638 in words is "eleven million, seven hundred eighty-eight thousand, six hundred thirty-eight".