130323440 has 40 divisors (see below), whose sum is σ = 326312448. Its totient is φ = 48119040.

The previous prime is 130323409. The next prime is 130323491. The reversal of 130323440 is 44323031.

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

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61616 + ... + 63695.

Almost surely, 2^130323440 is an apocalyptic number.

130323440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130323440 is an abundant number, since it is smaller than the sum of its proper divisors (195989008).

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

130323440 is a wasteful number, since it uses less digits than its factorization.

130323440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125337 (or 125331 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 130323440 is about 11415.9292219250. The cubic root of 130323440 is about 506.9994774013. Note that the first 3 decimals are identical.

Adding to 130323440 its reverse (44323031), we get a palindrome (174646471).

The spelling of 130323440 in words is "one hundred thirty million, three hundred twenty-three thousand, four hundred forty".