129304440 has 96 divisors (see below), whose sum is σ = 430063920. Its totient is φ = 33675264.

The previous prime is 129304433. The next prime is 129304457. The reversal of 129304440 is 44403921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11304 + ... + 19656.

Almost surely, 2^129304440 is an apocalyptic number.

129304440 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 129304440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215031960).

129304440 is an abundant number, since it is smaller than the sum of its proper divisors (300759480).

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

129304440 is a wasteful number, since it uses less digits than its factorization.

129304440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8413 (or 8406 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 129304440 is about 11371.2110173015. The cubic root of 129304440 is about 505.6746073574.

The spelling of 129304440 in words is "one hundred twenty-nine million, three hundred four thousand, four hundred forty".