129894320 has 20 divisors (see below), whose sum is σ = 302004480. Its totient is φ = 51957696.

The previous prime is 129894311. The next prime is 129894337. The reversal of 129894320 is 23498921.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811760 + ... + 811919.

It is an arithmetic number, because the mean of its divisors is an integer number (15100224).

Almost surely, 2^129894320 is an apocalyptic number.

129894320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129894320 is an abundant number, since it is smaller than the sum of its proper divisors (172110160).

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

129894320 is a wasteful number, since it uses less digits than its factorization.

129894320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623692 (or 1623686 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 129894320 is about 11397.1189341868. The cubic root of 129894320 is about 506.4423945866.

The spelling of 129894320 in words is "one hundred twenty-nine million, eight hundred ninety-four thousand, three hundred twenty".