130284640 has 24 divisors (see below), whose sum is σ = 307797840. Its totient is φ = 52113792.

The previous prime is 130284619. The next prime is 130284643. The reversal of 130284640 is 46482031.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 130284599 and 130284608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130284643) 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, 406980 + ... + 407299.

It is an arithmetic number, because the mean of its divisors is an integer number (12824910).

Almost surely, 2^130284640 is an apocalyptic number.

130284640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130284640 is an abundant number, since it is smaller than the sum of its proper divisors (177513200).

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

130284640 is an equidigital number, since it uses as much as digits as its factorization.

130284640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814294 (or 814286 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 130284640 is about 11414.2297155787. The cubic root of 130284640 is about 506.9491576424.

The spelling of 130284640 in words is "one hundred thirty million, two hundred eighty-four thousand, six hundred forty".