1338421718 has 4 divisors (see below), whose sum is σ = 2007632580. Its totient is φ = 669210858.

The previous prime is 1338421699. The next prime is 1338421771. The reversal of 1338421718 is 8171248331.

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

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, 334605428 + ... + 334605431.

It is an arithmetic number, because the mean of its divisors is an integer number (501908145).

Almost surely, 2^1338421718 is an apocalyptic number.

1338421718 is a deficient number, since it is larger than the sum of its proper divisors (669210862).

1338421718 is an equidigital number, since it uses as much as digits as its factorization.

1338421718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669210861.

The product of its digits is 32256, while the sum is 38.

The square root of 1338421718 is about 36584.4463946087. The cubic root of 1338421718 is about 1102.0407619724.

The spelling of 1338421718 in words is "one billion, three hundred thirty-eight million, four hundred twenty-one thousand, seven hundred eighteen".