1320891884 has 24 divisors (see below), whose sum is σ = 2575216560. Its totient is φ = 588619584.

The previous prime is 1320891833. The next prime is 1320891907. The reversal of 1320891884 is 4881980231.

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 7 ways as a sum of consecutive naturals, for example, 436454 + ... + 439469.

It is an arithmetic number, because the mean of its divisors is an integer number (107300690).

Almost surely, 2^1320891884 is an apocalyptic number.

It is an amenable number.

1320891884 is a deficient number, since it is larger than the sum of its proper divisors (1254324676).

1320891884 is a wasteful number, since it uses less digits than its factorization.

1320891884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875969 (or 875967 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 1320891884 is about 36344.0763261360. The cubic root of 1320891884 is about 1097.2083160356.

The spelling of 1320891884 in words is "one billion, three hundred twenty million, eight hundred ninety-one thousand, eight hundred eighty-four".