129320408 has 24 divisors (see below), whose sum is σ = 282064500. Its totient is φ = 55422864.

The previous prime is 129320407. The next prime is 129320447. The reversal of 129320408 is 804023921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129320407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164558 + ... + 165341.

Almost surely, 2^129320408 is an apocalyptic number.

It is an amenable number.

129320408 is an abundant number, since it is smaller than the sum of its proper divisors (152744092).

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

129320408 is a wasteful number, since it uses less digits than its factorization.

129320408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329919 (or 329908 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 129320408 is about 11371.9131196118. The cubic root of 129320408 is about 505.6954220068.

The spelling of 129320408 in words is "one hundred twenty-nine million, three hundred twenty thousand, four hundred eight".