1320399194 has 32 divisors (see below), whose sum is σ = 2063698560. Its totient is φ = 633169152.

The previous prime is 1320399193. The next prime is 1320399221. The reversal of 1320399194 is 4919930231.

It is not an unprimeable number, because it can be changed into a prime (1320399193) 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, 1277702 + ... + 1278734.

It is an arithmetic number, because the mean of its divisors is an integer number (64490580).

Almost surely, 2^1320399194 is an apocalyptic number.

1320399194 is a deficient number, since it is larger than the sum of its proper divisors (743299366).

1320399194 is a wasteful number, since it uses less digits than its factorization.

1320399194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1320399194 is about 36337.2975604956. The cubic root of 1320399194 is about 1097.0718802435.

The spelling of 1320399194 in words is "one billion, three hundred twenty million, three hundred ninety-nine thousand, one hundred ninety-four".