11988638 has 8 divisors (see below), whose sum is σ = 19040832. Its totient is φ = 5641696.

The previous prime is 11988637. The next prime is 11988643. The reversal of 11988638 is 83688911.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11988631) 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, 176270 + ... + 176337.

It is an arithmetic number, because the mean of its divisors is an integer number (2380104).

Almost surely, 2^11988638 is an apocalyptic number.

11988638 is a deficient number, since it is larger than the sum of its proper divisors (7052194).

11988638 is a wasteful number, since it uses less digits than its factorization.

11988638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352626.

The product of its digits is 82944, while the sum is 44.

The square root of 11988638 is about 3462.4612633212. The cubic root of 11988638 is about 228.8705687868.

The spelling of 11988638 in words is "eleven million, nine hundred eighty-eight thousand, six hundred thirty-eight".