129530310 has 128 divisors (see below), whose sum is σ = 405264384. Its totient is φ = 25712640.

The previous prime is 129530299. The next prime is 129530329. The reversal of 129530310 is 13035921.

It is a happy number.

It is a super-2 number, since 2×129530310² = 33556202417392200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45015 + ... + 47805.

It is an arithmetic number, because the mean of its divisors is an integer number (3166128).

Almost surely, 2^129530310 is an apocalyptic number.

129530310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129530310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202632192).

129530310 is an abundant number, since it is smaller than the sum of its proper divisors (275734074).

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

129530310 is a wasteful number, since it uses less digits than its factorization.

129530310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 129530310 is about 11381.1383437686. The cubic root of 129530310 is about 505.9688748580.

The spelling of 129530310 in words is "one hundred twenty-nine million, five hundred thirty thousand, three hundred ten".