129872330 has 64 divisors (see below), whose sum is σ = 279078912. Its totient is φ = 42577920.

The previous prime is 129872317. The next prime is 129872339. The reversal of 129872330 is 33278921.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (129872339) 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 31 ways as a sum of consecutive naturals, for example, 210182 + ... + 210798.

It is an arithmetic number, because the mean of its divisors is an integer number (4360608).

Almost surely, 2^129872330 is an apocalyptic number.

129872330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129872330 is an abundant number, since it is smaller than the sum of its proper divisors (149206582).

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

129872330 is a wasteful number, since it uses less digits than its factorization.

129872330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 129872330 is about 11396.1541758613. The cubic root of 129872330 is about 506.4138141817.

The spelling of 129872330 in words is "one hundred twenty-nine million, eight hundred seventy-two thousand, three hundred thirty".