130281640 has 32 divisors (see below), whose sum is σ = 297155880. Its totient is φ = 51397632.

The previous prime is 130281607. The next prime is 130281647. The reversal of 130281640 is 46182031.

It can be written as a sum of positive squares in 4 ways, for example, as 80748196 + 49533444 = 8986^2 + 7038^2 .

It is not an unprimeable number, because it can be changed into a prime (130281647) 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, 19389 + ... + 25228.

Almost surely, 2^130281640 is an apocalyptic number.

130281640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130281640 is an abundant number, since it is smaller than the sum of its proper divisors (166874240).

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

130281640 is a wasteful number, since it uses less digits than its factorization.

130281640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44701 (or 44697 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 130281640 is about 11414.0982999096. The cubic root of 130281640 is about 506.9452665233.

The spelling of 130281640 in words is "one hundred thirty million, two hundred eighty-one thousand, six hundred forty".