1138636 has 6 divisors (see below), whose sum is σ = 1992620. Its totient is φ = 569316.

The previous prime is 1138591. The next prime is 1138637. The reversal of 1138636 is 6368311.

It is not an unprimeable number, because it can be changed into a prime (1138637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142326 + ... + 142333.

2^1138636 is an apocalyptic number.

It is an amenable number.

1138636 is a deficient number, since it is larger than the sum of its proper divisors (853984).

1138636 is a wasteful number, since it uses less digits than its factorization.

1138636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284663 (or 284661 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1138636 is about 1067.0688825001. The cubic root of 1138636 is about 104.4227124780.

The spelling of 1138636 in words is "one million, one hundred thirty-eight thousand, six hundred thirty-six".