129346940 has 24 divisors (see below), whose sum is σ = 283439520. Its totient is φ = 49489088.

The previous prime is 129346909. The next prime is 129346969. The reversal of 129346940 is 49643921.

It is a junction number, because it is equal to n+sod(n) for n = 129346894 and 129346903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140135 + ... + 141054.

It is an arithmetic number, because the mean of its divisors is an integer number (11809980).

Almost surely, 2^129346940 is an apocalyptic number.

129346940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129346940 is an abundant number, since it is smaller than the sum of its proper divisors (154092580).

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

129346940 is a wasteful number, since it uses less digits than its factorization.

129346940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281221 (or 281219 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 129346940 is about 11373.0796181158. The cubic root of 129346940 is about 505.7300032810.

The spelling of 129346940 in words is "one hundred twenty-nine million, three hundred forty-six thousand, nine hundred forty".