130520440 has 32 divisors (see below), whose sum is σ = 295994880. Its totient is φ = 51795072.

The previous prime is 130520431. The next prime is 130520459. The reversal of 130520440 is 44025031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7767 + ... + 17926.

It is an arithmetic number, because the mean of its divisors is an integer number (9249840).

Almost surely, 2^130520440 is an apocalyptic number.

130520440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130520440 is an abundant number, since it is smaller than the sum of its proper divisors (165474440).

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

130520440 is a wasteful number, since it uses less digits than its factorization.

130520440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25831 (or 25827 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 130520440 is about 11424.5542582632. The cubic root of 130520440 is about 507.2548129287.

Adding to 130520440 its reverse (44025031), we get a palindrome (174545471).

The spelling of 130520440 in words is "one hundred thirty million, five hundred twenty thousand, four hundred forty".