11738639 has 8 divisors (see below), whose sum is σ = 12873168. Its totient is φ = 10615360.

The previous prime is 11738627. The next prime is 11738647. The reversal of 11738639 is 93683711.

11738639 = T₂₄₂ + T₂₄₃ + ... + T₄₃₈.

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

It is a cyclic number.

It is not a de Polignac number, because 11738639 - 2⁸ = 11738383 is a prime.

It is a super-3 number, since 3×11738639³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11738609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (1609146).

Almost surely, 2^11738639 is an apocalyptic number.

11738639 is a deficient number, since it is larger than the sum of its proper divisors (1134529).

11738639 is a wasteful number, since it uses less digits than its factorization.

11738639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625.

The product of its digits is 27216, while the sum is 38.

The square root of 11738639 is about 3426.1697272610. The cubic root of 11738639 is about 227.2685017833.

The spelling of 11738639 in words is "eleven million, seven hundred thirty-eight thousand, six hundred thirty-nine".