130866640 has 40 divisors (see below), whose sum is σ = 304980480. Its totient is φ = 52223616.

The previous prime is 130866613. The next prime is 130866641. The reversal of 130866640 is 46668031.

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

It is a junction number, because it is equal to n+sod(n) for n = 130866596 and 130866605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130866641) 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, 37281 + ... + 40639.

It is an arithmetic number, because the mean of its divisors is an integer number (7624512).

Almost surely, 2^130866640 is an apocalyptic number.

130866640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130866640 is an abundant number, since it is smaller than the sum of its proper divisors (174113840).

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

130866640 is a wasteful number, since it uses less digits than its factorization.

130866640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859 (or 3853 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 130866640 is about 11439.6958001513. The cubic root of 130866640 is about 507.7029076923.

The spelling of 130866640 in words is "one hundred thirty million, eight hundred sixty-six thousand, six hundred forty".