129390680 has 16 divisors (see below), whose sum is σ = 291129120. Its totient is φ = 51756256.

The previous prime is 129390659. The next prime is 129390719. The reversal of 129390680 is 86093921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617344 + ... + 1617423.

It is an arithmetic number, because the mean of its divisors is an integer number (18195570).

Almost surely, 2^129390680 is an apocalyptic number.

129390680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129390680 is an abundant number, since it is smaller than the sum of its proper divisors (161738440).

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

129390680 is a wasteful number, since it uses less digits than its factorization.

129390680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234778 (or 3234774 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 129390680 is about 11375.0024175822. The cubic root of 129390680 is about 505.7870027930.

The spelling of 129390680 in words is "one hundred twenty-nine million, three hundred ninety thousand, six hundred eighty".