129928896 has 84 divisors (see below), whose sum is σ = 374684544. Its totient is φ = 43046400.

The previous prime is 129928871. The next prime is 129928907. The reversal of 129928896 is 698829921.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109426 + ... + 110606.

Almost surely, 2^129928896 is an apocalyptic number.

129928896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129928896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187342272).

129928896 is an abundant number, since it is smaller than the sum of its proper divisors (244755648).

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

129928896 is a wasteful number, since it uses less digits than its factorization.

129928896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390 (or 1377 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 129928896 is about 11398.6357078380. The cubic root of 129928896 is about 506.4873264942.

The spelling of 129928896 in words is "one hundred twenty-nine million, nine hundred twenty-eight thousand, eight hundred ninety-six".