1316638 has 4 divisors (see below), whose sum is σ = 1974960. Its totient is φ = 658318.

The previous prime is 1316621. The next prime is 1316639. The reversal of 1316638 is 8366131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329158 + ... + 329161.

It is an arithmetic number, because the mean of its divisors is an integer number (493740).

2^1316638 is an apocalyptic number.

1316638 is a deficient number, since it is larger than the sum of its proper divisors (658322).

1316638 is an equidigital number, since it uses as much as digits as its factorization.

1316638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658321.

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

The square root of 1316638 is about 1147.4484737887. The cubic root of 1316638 is about 109.6029209622.

The spelling of 1316638 in words is "one million, three hundred sixteen thousand, six hundred thirty-eight".