129402340 has 24 divisors (see below), whose sum is σ = 276353280. Its totient is φ = 50883168.

The previous prime is 129402323. The next prime is 129402341. The reversal of 129402340 is 43204921.

It is not an unprimeable number, because it can be changed into a prime (129402341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53652 + ... + 56011.

It is an arithmetic number, because the mean of its divisors is an integer number (11514720).

Almost surely, 2^129402340 is an apocalyptic number.

129402340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129402340 is an abundant number, since it is smaller than the sum of its proper divisors (146950940).

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

129402340 is a wasteful number, since it uses less digits than its factorization.

129402340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109731 (or 109729 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 129402340 is about 11375.5149333997. The cubic root of 129402340 is about 505.8021952817.

The spelling of 129402340 in words is "one hundred twenty-nine million, four hundred two thousand, three hundred forty".