129957384 has 32 divisors (see below), whose sum is σ = 344005920. Its totient is φ = 40770816.

The previous prime is 129957379. The next prime is 129957391. The reversal of 129957384 is 483759921.

It is a super-2 number, since 2×129957384² = 33777843312246912, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 158854 + ... + 159669.

It is an arithmetic number, because the mean of its divisors is an integer number (10750185).

Almost surely, 2^129957384 is an apocalyptic number.

It is an amenable number.

129957384 is an abundant number, since it is smaller than the sum of its proper divisors (214048536).

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

129957384 is a wasteful number, since it uses less digits than its factorization.

129957384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318549 (or 318545 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 129957384 is about 11399.8852625805. The cubic root of 129957384 is about 506.5243409870.

The spelling of 129957384 in words is "one hundred twenty-nine million, nine hundred fifty-seven thousand, three hundred eighty-four".