130143440 has 80 divisors (see below), whose sum is σ = 347394432. Its totient is φ = 44416512.

The previous prime is 130143421. The next prime is 130143443. The reversal of 130143440 is 44341031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130143443) 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 15 ways as a sum of consecutive naturals, for example, 171542 + ... + 172298.

Almost surely, 2^130143440 is an apocalyptic number.

130143440 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 130143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173697216).

130143440 is an abundant number, since it is smaller than the sum of its proper divisors (217250992).

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

130143440 is a wasteful number, since it uses less digits than its factorization.

130143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 130143440 is about 11408.0427769184. The cubic root of 130143440 is about 506.7659508420.

Adding to 130143440 its reverse (44341031), we get a palindrome (174484471).

The spelling of 130143440 in words is "one hundred thirty million, one hundred forty-three thousand, four hundred forty".