130531780 has 24 divisors (see below), whose sum is σ = 290242008. Its totient is φ = 49141248.

The previous prime is 130531771. The next prime is 130531801. The reversal of 130531780 is 87135031.

It can be written as a sum of positive squares in 4 ways, for example, as 2208196 + 128323584 = 1486^2 + 11328^2 .

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, 191619 + ... + 192298.

It is an arithmetic number, because the mean of its divisors is an integer number (12093417).

Almost surely, 2^130531780 is an apocalyptic number.

130531780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130531780 is an abundant number, since it is smaller than the sum of its proper divisors (159710228).

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

130531780 is a wasteful number, since it uses less digits than its factorization.

130531780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383943 (or 383941 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 130531780 is about 11425.0505469341. The cubic root of 130531780 is about 507.2695031003.

The spelling of 130531780 in words is "one hundred thirty million, five hundred thirty-one thousand, seven hundred eighty".