129068940 has 288 divisors, whose sum is σ = 495500544. Its totient is φ = 24675840.

The previous prime is 129068923. The next prime is 129068941. The reversal of 129068940 is 49860921.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (129068941) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 420267 + ... + 420573.

It is an arithmetic number, because the mean of its divisors is an integer number (1720488).

Almost surely, 2^129068940 is an apocalyptic number.

129068940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129068940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247750272).

129068940 is an abundant number, since it is smaller than the sum of its proper divisors (366431604).

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

129068940 is a wasteful number, since it uses less digits than its factorization.

129068940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 129068940 is about 11360.8512005043. The cubic root of 129068940 is about 505.3674285785.

The spelling of 129068940 in words is "one hundred twenty-nine million, sixty-eight thousand, nine hundred forty".