1315342440 has 96 divisors (see below), whose sum is σ = 4314941280. Its totient is φ = 347469696.

The previous prime is 1315342409. The next prime is 1315342447. The reversal of 1315342440 is 442435131.

It is a happy number.

1315342440 is a `hidden beast` number, since 1 + 315 + 342 + 4 + 4 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (1315342447) 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 23 ways as a sum of consecutive naturals, for example, 21447 + ... + 55593.

It is an arithmetic number, because the mean of its divisors is an integer number (44947305).

Almost surely, 2^1315342440 is an apocalyptic number.

1315342440 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 1315342440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157470640).

1315342440 is an abundant number, since it is smaller than the sum of its proper divisors (2999598840).

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

1315342440 is a wasteful number, since it uses less digits than its factorization.

1315342440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34271 (or 34264 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1315342440 is about 36267.6500479422. The cubic root of 1315342440 is about 1095.6695973354.

Adding to 1315342440 its reverse (442435131), we get a palindrome (1757777571).

The spelling of 1315342440 in words is "one billion, three hundred fifteen million, three hundred forty-two thousand, four hundred forty".