1311442040 has 16 divisors (see below), whose sum is σ = 2950744680. Its totient is φ = 524576800.

The previous prime is 1311442021. The next prime is 1311442049. The reversal of 1311442040 is 402441131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311442049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16392986 + ... + 16393065.

Almost surely, 2^1311442040 is an apocalyptic number.

1311442040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311442040 is an abundant number, since it is smaller than the sum of its proper divisors (1639302640).

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

1311442040 is a wasteful number, since it uses less digits than its factorization.

1311442040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32786062 (or 32786058 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1311442040 is about 36213.8376867186. The cubic root of 1311442040 is about 1094.5855245558.

Adding to 1311442040 its reverse (402441131), we get a palindrome (1713883171).

Subtracting from 1311442040 its reverse (402441131), we obtain a palindrome (909000909).

The spelling of 1311442040 in words is "one billion, three hundred eleven million, four hundred forty-two thousand, forty".