1320433140 has 48 divisors (see below), whose sum is σ = 3981616128. Its totient is φ = 325029504.

The previous prime is 1320433123. The next prime is 1320433199. The reversal of 1320433140 is 413340231.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 845652 + ... + 847211.

It is an arithmetic number, because the mean of its divisors is an integer number (82950336).

Almost surely, 2^1320433140 is an apocalyptic number.

1320433140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320433140 is an abundant number, since it is smaller than the sum of its proper divisors (2661182988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320433140 is a wasteful number, since it uses less digits than its factorization.

1320433140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692888 (or 1692886 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1320433140 is about 36337.7646533190. The cubic root of 1320433140 is about 1097.0812816637.

Adding to 1320433140 its reverse (413340231), we get a palindrome (1733773371).

The spelling of 1320433140 in words is "one billion, three hundred twenty million, four hundred thirty-three thousand, one hundred forty".