130631640 has 64 divisors (see below), whose sum is σ = 393608160. Its totient is φ = 34682880.

The previous prime is 130631629. The next prime is 130631663. The reversal of 130631640 is 46136031.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 130631640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26662 + ... + 31178.

Almost surely, 2^130631640 is an apocalyptic number.

130631640 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 130631640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196804080).

130631640 is an abundant number, since it is smaller than the sum of its proper divisors (262976520).

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

130631640 is a wasteful number, since it uses less digits than its factorization.

130631640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772 (or 4768 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 130631640 is about 11429.4199327875. The cubic root of 130631640 is about 507.3988279804.

Adding to 130631640 its reverse (46136031), we get a palindrome (176767671).

The spelling of 130631640 in words is "one hundred thirty million, six hundred thirty-one thousand, six hundred forty".