129936744 has 128 divisors (see below), whose sum is σ = 434304000. Its totient is φ = 35163072.

The previous prime is 129936731. The next prime is 129936787. The reversal of 129936744 is 447639921.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 129936744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26467 + ... + 30989.

It is an arithmetic number, because the mean of its divisors is an integer number (3393000).

Almost surely, 2^129936744 is an apocalyptic number.

129936744 is a gapful number since it is divisible by the number (14) 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 129936744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217152000).

129936744 is an abundant number, since it is smaller than the sum of its proper divisors (304367256).

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

129936744 is a wasteful number, since it uses less digits than its factorization.

129936744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564 (or 4554 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 129936744 is about 11398.9799543643. The cubic root of 129936744 is about 506.4975239500.

The spelling of 129936744 in words is "one hundred twenty-nine million, nine hundred thirty-six thousand, seven hundred forty-four".