129226736 has 20 divisors (see below), whose sum is σ = 250890192. Its totient is φ = 64480896.

The previous prime is 129226729. The next prime is 129226753. The reversal of 129226736 is 637622921.

It is a self number, because there is not a number n which added to its sum of digits gives 129226736.

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, 20 + ... + 16076.

Almost surely, 2^129226736 is an apocalyptic number.

129226736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129226736 is a deficient number, since it is larger than the sum of its proper divisors (121663456).

129226736 is a wasteful number, since it uses less digits than its factorization.

129226736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16568 (or 16562 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 129226736 is about 11367.7938053080. The cubic root of 129226736 is about 505.5732939681.

The spelling of 129226736 in words is "one hundred twenty-nine million, two hundred twenty-six thousand, seven hundred thirty-six".