1118638 has 4 divisors (see below), whose sum is σ = 1677960. Its totient is φ = 559318.

The previous prime is 1118629. The next prime is 1118653. The reversal of 1118638 is 8368111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 279658 + ... + 279661.

It is an arithmetic number, because the mean of its divisors is an integer number (419490).

2^1118638 is an apocalyptic number.

1118638 is a deficient number, since it is larger than the sum of its proper divisors (559322).

1118638 is an equidigital number, since it uses as much as digits as its factorization.

1118638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559321.

The product of its digits is 1152, while the sum is 28.

The square root of 1118638 is about 1057.6568441607. The cubic root of 1118638 is about 103.8077686700.

The spelling of 1118638 in words is "one million, one hundred eighteen thousand, six hundred thirty-eight".