1311443430 has 32 divisors (see below), whose sum is σ = 3433598208. Its totient is φ = 317925600.

The previous prime is 1311443407. The next prime is 1311443431. The reversal of 1311443430 is 343441131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311443430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311443431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986706 + ... + 1987365.

It is an arithmetic number, because the mean of its divisors is an integer number (107299944).

Almost surely, 2^1311443430 is an apocalyptic number.

1311443430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311443430 is an abundant number, since it is smaller than the sum of its proper divisors (2122154778).

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

1311443430 is a wasteful number, since it uses less digits than its factorization.

1311443430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974092.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1311443430 is about 36213.8568782724. The cubic root of 1311443430 is about 1094.5859112734.

Adding to 1311443430 its reverse (343441131), we get a palindrome (1654884561).

The spelling of 1311443430 in words is "one billion, three hundred eleven million, four hundred forty-three thousand, four hundred thirty".