130291640 has 16 divisors (see below), whose sum is σ = 293156280. Its totient is φ = 52116640.

The previous prime is 130291627. The next prime is 130291643. The reversal of 130291640 is 46192031.

It is a super-2 number, since 2×130291640² = 33951822907779200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130291643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628606 + ... + 1628685.

Almost surely, 2^130291640 is an apocalyptic number.

130291640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130291640 is an abundant number, since it is smaller than the sum of its proper divisors (162864640).

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

130291640 is a wasteful number, since it uses less digits than its factorization.

130291640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257302 (or 3257298 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 130291640 is about 11414.5363462560. The cubic root of 130291640 is about 506.9582366879.

The spelling of 130291640 in words is "one hundred thirty million, two hundred ninety-one thousand, six hundred forty".