129670896 has 40 divisors (see below), whose sum is σ = 352616320. Its totient is φ = 40948416.

The previous prime is 129670889. The next prime is 129670907. The reversal of 129670896 is 698076921.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 70180 + ... + 72003.

It is an arithmetic number, because the mean of its divisors is an integer number (8815408).

Almost surely, 2^129670896 is an apocalyptic number.

129670896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129670896 is an abundant number, since it is smaller than the sum of its proper divisors (222945424).

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

129670896 is a wasteful number, since it uses less digits than its factorization.

129670896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142213 (or 142207 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 129670896 is about 11387.3129402858. The cubic root of 129670896 is about 506.1518601409.

The spelling of 129670896 in words is "one hundred twenty-nine million, six hundred seventy thousand, eight hundred ninety-six".