130806528 has 72 divisors (see below), whose sum is σ = 350431536. Its totient is φ = 43315200.

The previous prime is 130806527. The next prime is 130806547. The reversal of 130806528 is 825608031.

It is a happy number.

130806528 is nontrivially palindromic in base 11.

It is a super-2 number, since 2×130806528² = 34220695534829568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130806527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138538 + ... + 139478.

Almost surely, 2^130806528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130806528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175215768).

130806528 is an abundant number, since it is smaller than the sum of its proper divisors (219625008).

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

130806528 is an equidigital number, since it uses as much as digits as its factorization.

130806528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 130806528 is about 11437.0681557819. The cubic root of 130806528 is about 507.6251600676.

The spelling of 130806528 in words is "one hundred thirty million, eight hundred six thousand, five hundred twenty-eight".