129346668 has 36 divisors (see below), whose sum is σ = 356684328. Its totient is φ = 39195840.

The previous prime is 129346639. The next prime is 129346673. The reversal of 129346668 is 866643921.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162921 + ... + 163712.

It is an arithmetic number, because the mean of its divisors is an integer number (9907898).

Almost surely, 2^129346668 is an apocalyptic number.

129346668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

129346668 is an abundant number, since it is smaller than the sum of its proper divisors (227337660).

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

129346668 is a wasteful number, since it uses less digits than its factorization.

129346668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326654 (or 326649 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 129346668 is about 11373.0676600467. The cubic root of 129346668 is about 505.7296487857.

It can be divided in two parts, 1293 and 46668, that added together give a square (47961 = 219²).

The spelling of 129346668 in words is "one hundred twenty-nine million, three hundred forty-six thousand, six hundred sixty-eight".