1310440140 has 48 divisors (see below), whose sum is σ = 4076926560. Its totient is φ = 349450560.

The previous prime is 1310440133. The next prime is 1310440141. The reversal of 1310440140 is 410440131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1310440141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212831 + ... + 1213910.

It is an arithmetic number, because the mean of its divisors is an integer number (84935970).

Almost surely, 2^1310440140 is an apocalyptic number.

1310440140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1310440140 is an abundant number, since it is smaller than the sum of its proper divisors (2766486420).

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

1310440140 is a wasteful number, since it uses less digits than its factorization.

1310440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426759 (or 2426751 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1310440140 is about 36200.0019337016. The cubic root of 1310440140 is about 1094.3067107018.

Adding to 1310440140 its reverse (410440131), we get a palindrome (1720880271).

Subtracting from 1310440140 its reverse (410440131), we obtain a palindrome (900000009).

The spelling of 1310440140 in words is "one billion, three hundred ten million, four hundred forty thousand, one hundred forty".