130231440 has 120 divisors (see below), whose sum is σ = 440114688. Its totient is φ = 34510080.

The previous prime is 130231427. The next prime is 130231481. The reversal of 130231440 is 44132031.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137047 + ... + 137993.

Almost surely, 2^130231440 is an apocalyptic number.

130231440 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 130231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220057344).

130231440 is an abundant number, since it is smaller than the sum of its proper divisors (309883248).

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

130231440 is a wasteful number, since it uses less digits than its factorization.

130231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 130231440 is about 11411.8990531813. The cubic root of 130231440 is about 506.8801462661.

Adding to 130231440 its reverse (44132031), we get a palindrome (174363471).

The spelling of 130231440 in words is "one hundred thirty million, two hundred thirty-one thousand, four hundred forty".