1361841890 has 16 divisors (see below), whose sum is σ = 2497567608. Its totient is φ = 534458496.

The previous prime is 1361841889. The next prime is 1361841913. The reversal of 1361841890 is 981481631.

It can be written as a sum of positive squares in 4 ways, for example, as 1324741609 + 37100281 = 36397^2 + 6091^2 .

It is a super-2 number, since 2×1361841890² = 3709226666717544200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1284227 + ... + 1285286.

Almost surely, 2^1361841890 is an apocalyptic number.

1361841890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1361841890 is a deficient number, since it is larger than the sum of its proper divisors (1135725718).

1361841890 is a wasteful number, since it uses less digits than its factorization.

1361841890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569573.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 1361841890 is about 36903.1420071516. The cubic root of 1361841890 is about 1108.4315944063.

The spelling of 1361841890 in words is "one billion, three hundred sixty-one million, eight hundred forty-one thousand, eight hundred ninety".