130557440 has 80 divisors (see below), whose sum is σ = 337197168. Its totient is φ = 48193536.

The previous prime is 130557439. The next prime is 130557451. The reversal of 130557440 is 44755031.

It is a tau number, because it is divible by the number of its divisors (80).

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, 31319 + ... + 35241.

Almost surely, 2^130557440 is an apocalyptic number.

130557440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130557440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168598584).

130557440 is an abundant number, since it is smaller than the sum of its proper divisors (206639728).

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

130557440 is an equidigital number, since it uses as much as digits as its factorization.

130557440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959 (or 3943 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 130557440 is about 11426.1734627127. The cubic root of 130557440 is about 507.3027406833.

The spelling of 130557440 in words is "one hundred thirty million, five hundred fifty-seven thousand, four hundred forty".