11639838 has 32 divisors (see below), whose sum is σ = 26712576. Its totient is φ = 3312288.

The previous prime is 11639819. The next prime is 11639839. The reversal of 11639838 is 83893611.

11639838 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 11639796 and 11639805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15295 + ... + 16037.

It is an arithmetic number, because the mean of its divisors is an integer number (834768).

Almost surely, 2^11639838 is an apocalyptic number.

11639838 is an abundant number, since it is smaller than the sum of its proper divisors (15072738).

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

11639838 is a wasteful number, since it uses less digits than its factorization.

11639838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its digits is 31104, while the sum is 39.

The square root of 11639838 is about 3411.7206802433. The cubic root of 11639838 is about 226.6290849842.

The spelling of 11639838 in words is "eleven million, six hundred thirty-nine thousand, eight hundred thirty-eight".