129840376 has 16 divisors (see below), whose sum is σ = 256264200. Its totient is φ = 61503264.

The previous prime is 129840353. The next prime is 129840383. The reversal of 129840376 is 673048921.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 426955 + ... + 427258.

Almost surely, 2^129840376 is an apocalyptic number.

It is an amenable number.

129840376 is a deficient number, since it is larger than the sum of its proper divisors (126423824).

129840376 is a wasteful number, since it uses less digits than its factorization.

129840376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854238 (or 854234 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 129840376 is about 11394.7521254304. The cubic root of 129840376 is about 506.3722778146.

The spelling of 129840376 in words is "one hundred twenty-nine million, eight hundred forty thousand, three hundred seventy-six".