129047296 has 144 divisors (see below), whose sum is σ = 320237568. Its totient is φ = 50688000.

The previous prime is 129047251. The next prime is 129047309. The reversal of 129047296 is 692740921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1277646 + ... + 1277746.

It is an arithmetic number, because the mean of its divisors is an integer number (2223872).

Almost surely, 2^129047296 is an apocalyptic number.

129047296 is a gapful number since it is divisible by the number (16) 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 129047296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160118784).

129047296 is an abundant number, since it is smaller than the sum of its proper divisors (191190272).

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

129047296 is a wasteful number, since it uses less digits than its factorization.

129047296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 129047296 is about 11359.8985910967. The cubic root of 129047296 is about 505.3391780841.

The spelling of 129047296 in words is "one hundred twenty-nine million, forty-seven thousand, two hundred ninety-six".