129530718 has 32 divisors (see below), whose sum is σ = 304780320. Its totient is φ = 40636800.

The previous prime is 129530717. The next prime is 129530743. The reversal of 129530718 is 817035921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129530717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69633 + ... + 71468.

It is an arithmetic number, because the mean of its divisors is an integer number (9524385).

Almost surely, 2^129530718 is an apocalyptic number.

129530718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129530718 is an abundant number, since it is smaller than the sum of its proper divisors (175249602).

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

129530718 is a wasteful number, since it uses less digits than its factorization.

129530718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141129 (or 141123 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 129530718 is about 11381.1562681478. The cubic root of 129530718 is about 505.9694060981.

The spelling of 129530718 in words is "one hundred twenty-nine million, five hundred thirty thousand, seven hundred eighteen".