130781720 has 32 divisors (see below), whose sum is σ = 295233120. Its totient is φ = 52139520.

The previous prime is 130781719. The next prime is 130781753. The reversal of 130781720 is 27187031.

It is a super-3 number, since 3×130781720³ (a number of 25 digits) contains 333 as substring.

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, 7184 + ... + 17696.

It is an arithmetic number, because the mean of its divisors is an integer number (9226035).

Almost surely, 2^130781720 is an apocalyptic number.

130781720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130781720 is an abundant number, since it is smaller than the sum of its proper divisors (164451400).

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

130781720 is a wasteful number, since it uses less digits than its factorization.

130781720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10835 (or 10831 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 130781720 is about 11435.9835606737. The cubic root of 130781720 is about 507.5930669671.

The spelling of 130781720 in words is "one hundred thirty million, seven hundred eighty-one thousand, seven hundred twenty".