130507028 has 24 divisors (see below), whose sum is σ = 242889192. Its totient is φ = 61144064.

The previous prime is 130507009. The next prime is 130507051. The reversal of 130507028 is 820705031.

It can be written as a sum of positive squares in 4 ways, for example, as 24581764 + 105925264 = 4958^2 + 10292^2 .

It is a junction number, because it is equal to n+sod(n) for n = 130506988 and 130507006.

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, 11726 + ... + 19962.

It is an arithmetic number, because the mean of its divisors is an integer number (10120383).

Almost surely, 2^130507028 is an apocalyptic number.

It is an amenable number.

130507028 is a deficient number, since it is larger than the sum of its proper divisors (112382164).

130507028 is a wasteful number, since it uses less digits than its factorization.

130507028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8491 (or 8489 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 130507028 is about 11423.9672618579. The cubic root of 130507028 is about 507.2374375286.

The spelling of 130507028 in words is "one hundred thirty million, five hundred seven thousand, twenty-eight".