1320403432 has 16 divisors (see below), whose sum is σ = 2492374500. Its totient is φ = 655770240.

The previous prime is 1320403387. The next prime is 1320403439. The reversal of 1320403432 is 2343040231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1280637796 + 39765636 = 35786^2 + 6306^2 .

It is not an unprimeable number, because it can be changed into a prime (1320403439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552669 + ... + 555052.

Almost surely, 2^1320403432 is an apocalyptic number.

It is an amenable number.

1320403432 is a deficient number, since it is larger than the sum of its proper divisors (1171971068).

1320403432 is a wasteful number, since it uses less digits than its factorization.

1320403432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107876 (or 1107872 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 1320403432 is about 36337.3558751872. The cubic root of 1320403432 is about 1097.0730539758.

Adding to 1320403432 its reverse (2343040231), we get a palindrome (3663443663).

The spelling of 1320403432 in words is "one billion, three hundred twenty million, four hundred three thousand, four hundred thirty-two".