1116638 has 4 divisors (see below), whose sum is σ = 1674960. Its totient is φ = 558318.

The previous prime is 1116637. The next prime is 1116641. The reversal of 1116638 is 8366111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8366111 = 13 ⋅643547.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 279158 + ... + 279161.

It is an arithmetic number, because the mean of its divisors is an integer number (418740).

2^1116638 is an apocalyptic number.

1116638 is a deficient number, since it is larger than the sum of its proper divisors (558322).

1116638 is an equidigital number, since it uses as much as digits as its factorization.

1116638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558321.

The product of its digits is 864, while the sum is 26.

The square root of 1116638 is about 1056.7109349297. The cubic root of 1116638 is about 103.7458661923.

The spelling of 1116638 in words is "one million, one hundred sixteen thousand, six hundred thirty-eight".