1367638 has 4 divisors (see below), whose sum is σ = 2051460. Its totient is φ = 683818.

The previous prime is 1367617. The next prime is 1367647. The reversal of 1367638 is 8367631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8367631 = 29 ⋅288539.

It is an Ulam number.

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, 341908 + ... + 341911.

It is an arithmetic number, because the mean of its divisors is an integer number (512865).

2^1367638 is an apocalyptic number.

1367638 is a deficient number, since it is larger than the sum of its proper divisors (683822).

1367638 is an equidigital number, since it uses as much as digits as its factorization.

1367638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683821.

The product of its digits is 18144, while the sum is 34.

The square root of 1367638 is about 1169.4605594034. The cubic root of 1367638 is about 111.0001893782. Note that the first 3 decimals are identical.

The spelling of 1367638 in words is "one million, three hundred sixty-seven thousand, six hundred thirty-eight".