129346320 has 40 divisors (see below), whose sum is σ = 400974336. Its totient is φ = 34492288.

The previous prime is 129346313. The next prime is 129346331. The reversal of 129346320 is 23643921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269232 + ... + 269711.

Almost surely, 2^129346320 is an apocalyptic number.

129346320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129346320 is an abundant number, since it is smaller than the sum of its proper divisors (271628016).

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

129346320 is a wasteful number, since it uses less digits than its factorization.

129346320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538959 (or 538953 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 129346320 is about 11373.0523607341. The cubic root of 129346320 is about 505.7291952395.

The spelling of 129346320 in words is "one hundred twenty-nine million, three hundred forty-six thousand, three hundred twenty".