130311440 has 40 divisors (see below), whose sum is σ = 346257600. Its totient is φ = 44678016.

The previous prime is 130311437. The next prime is 130311473. The reversal of 130311440 is 44113031.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115790 + ... + 116909.

It is an arithmetic number, because the mean of its divisors is an integer number (8656440).

Almost surely, 2^130311440 is an apocalyptic number.

130311440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130311440 is an abundant number, since it is smaller than the sum of its proper divisors (215946160).

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

130311440 is a wasteful number, since it uses less digits than its factorization.

130311440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232719 (or 232713 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 130311440 is about 11415.4036284312. The cubic root of 130311440 is about 506.9839156562.

Adding to 130311440 its reverse (44113031), we get a palindrome (174424471).

The spelling of 130311440 in words is "one hundred thirty million, three hundred eleven thousand, four hundred forty".