129379928 has 32 divisors (see below), whose sum is σ = 263133360. Its totient is φ = 59397120.

The previous prime is 129379927. The next prime is 129379937. The reversal of 129379928 is 829973921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129379927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6026 + ... + 17177.

Almost surely, 2^129379928 is an apocalyptic number.

It is an amenable number.

129379928 is an abundant number, since it is smaller than the sum of its proper divisors (133753432).

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

129379928 is a wasteful number, since it uses less digits than its factorization.

129379928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23267 (or 23263 counting only the distinct ones).

The product of its digits is 489888, while the sum is 50.

The square root of 129379928 is about 11374.5297924793. The cubic root of 129379928 is about 505.7729925812.

The spelling of 129379928 in words is "one hundred twenty-nine million, three hundred seventy-nine thousand, nine hundred twenty-eight".