130640 has 40 divisors (see below), whose sum is σ = 321408. Its totient is φ = 49280.

The previous prime is 130639. The next prime is 130643. The reversal of 130640 is 46031.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805 + ... + 1875.

2¹³⁰⁶⁴⁰ is an apocalyptic number.

130640 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 130640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160704).

130640 is an abundant number, since it is smaller than the sum of its proper divisors (190768).

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

130640 is a wasteful number, since it uses less digits than its factorization.

130640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 130640 is about 361.4415582082. The cubic root of 130640 is about 50.7409651708.

Adding to 130640 its reverse (46031), we get a palindrome (176671).

The spelling of 130640 in words is "one hundred thirty thousand, six hundred forty".