1338842281 has 16 divisors (see below), whose sum is σ = 1569276544. Its totient is φ = 1118323584.

The previous prime is 1338842273. The next prime is 1338842363. The reversal of 1338842281 is 1822488331.

It is a happy number.

It is not a de Polignac number, because 1338842281 - 2³ = 1338842273 is a prime.

It is a super-2 number, since 2×1338842281² = 3584997306786565922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338842221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 132691 + ... + 142423.

It is an arithmetic number, because the mean of its divisors is an integer number (98079784).

Almost surely, 2^1338842281 is an apocalyptic number.

It is an amenable number.

1338842281 is a deficient number, since it is larger than the sum of its proper divisors (230434263).

1338842281 is an equidigital number, since it uses as much as digits as its factorization.

1338842281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10240.

The product of its digits is 73728, while the sum is 40.

The square root of 1338842281 is about 36590.1937819411. The cubic root of 1338842281 is about 1102.1561787667.

The spelling of 1338842281 in words is "one billion, three hundred thirty-eight million, eight hundred forty-two thousand, two hundred eighty-one".