1381333885 has 16 divisors (see below), whose sum is σ = 1740710016. Its totient is φ = 1050274368.

The previous prime is 1381333843. The next prime is 1381333907. The reversal of 1381333885 is 5883331831.

It is a cyclic number.

It is not a de Polignac number, because 1381333885 - 2⁷ = 1381333757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20199 + ... + 56308.

It is an arithmetic number, because the mean of its divisors is an integer number (108794376).

Almost surely, 2^1381333885 is an apocalyptic number.

It is an amenable number.

1381333885 is a deficient number, since it is larger than the sum of its proper divisors (359376131).

1381333885 is a wasteful number, since it uses less digits than its factorization.

1381333885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76692.

The product of its digits is 207360, while the sum is 43.

The square root of 1381333885 is about 37166.3003943088. The cubic root of 1381333885 is about 1113.6948767731.

The spelling of 1381333885 in words is "one billion, three hundred eighty-one million, three hundred thirty-three thousand, eight hundred eighty-five".