1381333818 has 16 divisors (see below), whose sum is σ = 2763034560. Its totient is φ = 460383456.

The previous prime is 1381333799. The next prime is 1381333843. The reversal of 1381333818 is 8183331831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71923 + ... + 89081.

It is an arithmetic number, because the mean of its divisors is an integer number (172689660).

Almost surely, 2^1381333818 is an apocalyptic number.

1381333818 is an abundant number, since it is smaller than the sum of its proper divisors (1381700742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1381333818 is a wasteful number, since it uses less digits than its factorization.

1381333818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30581.

The product of its digits is 41472, while the sum is 39.

The square root of 1381333818 is about 37166.2994929546. The cubic root of 1381333818 is about 1113.6948587669.

The spelling of 1381333818 in words is "one billion, three hundred eighty-one million, three hundred thirty-three thousand, eight hundred eighteen".