129349400 has 48 divisors (see below), whose sum is σ = 303094440. Its totient is φ = 51334400.

The previous prime is 129349399. The next prime is 129349421. The reversal of 129349400 is 4943921.

It is a happy number.

It is a congruent number.

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, 23732 + ... + 28668.

Almost surely, 2^129349400 is an apocalyptic number.

129349400 is a gapful number since it is divisible by the number (10) 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 129349400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151547220).

129349400 is an abundant number, since it is smaller than the sum of its proper divisors (173745040).

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

129349400 is a wasteful number, since it uses less digits than its factorization.

129349400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084 (or 5075 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 129349400 is about 11373.1877677281. The cubic root of 129349400 is about 505.7332093559.

The spelling of 129349400 in words is "one hundred twenty-nine million, three hundred forty-nine thousand, four hundred".