130306420 has 24 divisors (see below), whose sum is σ = 274433544. Its totient is φ = 51972096.

The previous prime is 130306417. The next prime is 130306499. The reversal of 130306420 is 24603031.

It can be written as a sum of positive squares in 4 ways, for example, as 19678096 + 110628324 = 4436^2 + 10518^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2169 + ... + 16288.

It is an arithmetic number, because the mean of its divisors is an integer number (11434731).

Almost surely, 2^130306420 is an apocalyptic number.

130306420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130306420 is an abundant number, since it is smaller than the sum of its proper divisors (144127124).

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

130306420 is a wasteful number, since it uses less digits than its factorization.

130306420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18819 (or 18817 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 130306420 is about 11415.1837479736. The cubic root of 130306420 is about 506.9774053760.

Adding to 130306420 its reverse (24603031), we get a palindrome (154909451).

The spelling of 130306420 in words is "one hundred thirty million, three hundred six thousand, four hundred twenty".