130643280 has 100 divisors (see below), whose sum is σ = 453765972. Its totient is φ = 34836480.

The previous prime is 130643239. The next prime is 130643291. The reversal of 130643280 is 82346031.

It is a happy number.

130643280 is a `hidden beast` number, since 13 + 0 + 643 + 2 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66194496 + 64448784 = 8136^2 + 8028^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3601 + ... + 16560.

Almost surely, 2^130643280 is an apocalyptic number.

130643280 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 130643280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226882986).

130643280 is an abundant number, since it is smaller than the sum of its proper divisors (323122692).

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

130643280 is a wasteful number, since it uses less digits than its factorization.

130643280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20186 (or 20171 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 130643280 is about 11429.9291336386. The cubic root of 130643280 is about 507.4138982113.

The spelling of 130643280 in words is "one hundred thirty million, six hundred forty-three thousand, two hundred eighty".