1320044402 has 4 divisors (see below), whose sum is σ = 1980066606. Its totient is φ = 660022200.

The previous prime is 1320044393. The next prime is 1320044413. The reversal of 1320044402 is 2044400231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 996728041 + 323316361 = 31571^2 + 17981^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 330011099 + ... + 330011102.

Almost surely, 2^1320044402 is an apocalyptic number.

1320044402 is a deficient number, since it is larger than the sum of its proper divisors (660022204).

1320044402 is an equidigital number, since it uses as much as digits as its factorization.

1320044402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660022203.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1320044402 is about 36332.4153064450. The cubic root of 1320044402 is about 1096.9736101658.

Adding to 1320044402 its reverse (2044400231), we get a palindrome (3364444633).

The spelling of 1320044402 in words is "one billion, three hundred twenty million, forty-four thousand, four hundred two".