1311334240 has 24 divisors (see below), whose sum is σ = 3098027520. Its totient is φ = 524533632.

The previous prime is 1311334223. The next prime is 1311334289. The reversal of 1311334240 is 424331131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4097760 + ... + 4098079.

It is an arithmetic number, because the mean of its divisors is an integer number (129084480).

Almost surely, 2^1311334240 is an apocalyptic number.

1311334240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311334240 is an abundant number, since it is smaller than the sum of its proper divisors (1786693280).

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

1311334240 is an equidigital number, since it uses as much as digits as its factorization.

1311334240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195854 (or 8195846 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1311334240 is about 36212.3492747985. The cubic root of 1311334240 is about 1094.5555322396. Note that the first 4 decimals are identical.

Adding to 1311334240 its reverse (424331131), we get a palindrome (1735665371).

The spelling of 1311334240 in words is "one billion, three hundred eleven million, three hundred thirty-four thousand, two hundred forty".