129823430 has 32 divisors (see below), whose sum is σ = 263723040. Its totient is φ = 45579520.

The previous prime is 129823427. The next prime is 129823439. The reversal of 129823430 is 34328921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129823439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17159 + ... + 23538.

It is an arithmetic number, because the mean of its divisors is an integer number (8241345).

Almost surely, 2^129823430 is an apocalyptic number.

129823430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129823430 is an abundant number, since it is smaller than the sum of its proper divisors (133899610).

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

129823430 is a wasteful number, since it uses less digits than its factorization.

129823430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40744.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 129823430 is about 11394.0085132494. The cubic root of 129823430 is about 506.3502472819.

The spelling of 129823430 in words is "one hundred twenty-nine million, eight hundred twenty-three thousand, four hundred thirty".