1320256430 has 16 divisors (see below), whose sum is σ = 2382140880. Its totient is φ = 526840512.

The previous prime is 1320256429. The next prime is 1320256433. The reversal of 1320256430 is 346520231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320256430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320256433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153359 + ... + 161738.

It is an arithmetic number, because the mean of its divisors is an integer number (148883805).

Almost surely, 2^1320256430 is an apocalyptic number.

1320256430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320256430 is a deficient number, since it is larger than the sum of its proper divisors (1061884450).

1320256430 is a wasteful number, since it uses less digits than its factorization.

1320256430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315523.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1320256430 is about 36335.3330795247. Note that the first 3 decimals coincide. The cubic root of 1320256430 is about 1097.0323396723.

Adding to 1320256430 its reverse (346520231), we get a palindrome (1666776661).

The spelling of 1320256430 in words is "one billion, three hundred twenty million, two hundred fifty-six thousand, four hundred thirty".