130643240 has 128 divisors (see below), whose sum is σ = 381024000. Its totient is φ = 39149568.

The previous prime is 130643239. The next prime is 130643291. The reversal of 130643240 is 42346031.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68216 + ... + 70104.

It is an arithmetic number, because the mean of its divisors is an integer number (2976750).

Almost surely, 2^130643240 is an apocalyptic number.

130643240 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 130643240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190512000).

130643240 is an abundant number, since it is smaller than the sum of its proper divisors (250380760).

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

130643240 is a wasteful number, since it uses less digits than its factorization.

130643240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 130643240 is about 11429.9273838463. The cubic root of 130643240 is about 507.4138464251.

Adding to 130643240 its reverse (42346031), we get a palindrome (172989271).

The spelling of 130643240 in words is "one hundred thirty million, six hundred forty-three thousand, two hundred forty".