129743824 has 20 divisors (see below), whose sum is σ = 287290144. Its totient is φ = 55604448.

The previous prime is 129743819. The next prime is 129743827. The reversal of 129743824 is 428347921.

It is a super-2 number, since 2×129743824² = 33666919732285952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129743827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579102 + ... + 579325.

Almost surely, 2^129743824 is an apocalyptic number.

129743824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129743824 is an abundant number, since it is smaller than the sum of its proper divisors (157546320).

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

129743824 is a wasteful number, since it uses less digits than its factorization.

129743824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158442 (or 1158436 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 129743824 is about 11390.5146503571. The cubic root of 129743824 is about 506.2467303757.

The spelling of 129743824 in words is "one hundred twenty-nine million, seven hundred forty-three thousand, eight hundred twenty-four".