1320086889 has 45 divisors (see below), whose sum is σ = 2173472301. Its totient is φ = 797872680.

The previous prime is 1320086861. The next prime is 1320086891. The reversal of 1320086889 is 9886800231.

The square root of 1320086889 is 36333.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1320086889 - 2²¹ = 1317989737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320086809) by changing a digit.

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 44 ways as a sum of consecutive naturals, for example, 3596784 + ... + 3597150.

Almost surely, 2^1320086889 is an apocalyptic number.

1320086889 is the 36333-rd square number.

1320086889 is the 18167-th centered octagonal number.

It is an amenable number.

1320086889 is a deficient number, since it is larger than the sum of its proper divisors (853385412).

1320086889 is an frugal number, since it uses more digits than its factorization.

1320086889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The cubic root of 1320086889 is about 1096.9853791178.

The spelling of 1320086889 in words is "one billion, three hundred twenty million, eighty-six thousand, eight hundred eighty-nine".