1311014440 has 64 divisors (see below), whose sum is σ = 3156048000. Its totient is φ = 488643840.

The previous prime is 1311014431. The next prime is 1311014443. The reversal of 1311014440 is 444101131.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1311014443) 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, 32221 + ... + 60499.

It is an arithmetic number, because the mean of its divisors is an integer number (49313250).

Almost surely, 2^1311014440 is an apocalyptic number.

1311014440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311014440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578024000).

1311014440 is an abundant number, since it is smaller than the sum of its proper divisors (1845033560).

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

1311014440 is a wasteful number, since it uses less digits than its factorization.

1311014440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28370 (or 28366 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1311014440 is about 36207.9333848260. The cubic root of 1311014440 is about 1094.4665472177.

Adding to 1311014440 its reverse (444101131), we get a palindrome (1755115571).

The spelling of 1311014440 in words is "one billion, three hundred eleven million, fourteen thousand, four hundred forty".