129892530 has 32 divisors (see below), whose sum is σ = 312076800. Its totient is φ = 34600832.

The previous prime is 129892517. The next prime is 129892591. The reversal of 129892530 is 35298921.

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 15 ways as a sum of consecutive naturals, for example, 36991 + ... + 40349.

It is an arithmetic number, because the mean of its divisors is an integer number (9752400).

Almost surely, 2^129892530 is an apocalyptic number.

129892530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129892530 is an abundant number, since it is smaller than the sum of its proper divisors (182184270).

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

129892530 is a wasteful number, since it uses less digits than its factorization.

129892530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 129892530 is about 11397.0404052982. The cubic root of 129892530 is about 506.4400682441.

The spelling of 129892530 in words is "one hundred twenty-nine million, eight hundred ninety-two thousand, five hundred thirty".