129579380 has 96 divisors (see below), whose sum is σ = 326215680. Its totient is φ = 42301440.

The previous prime is 129579371. The next prime is 129579391. The reversal of 129579380 is 83975921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316616 + ... + 317024.

It is an arithmetic number, because the mean of its divisors is an integer number (3398080).

Almost surely, 2^129579380 is an apocalyptic number.

129579380 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 129579380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163107840).

129579380 is an abundant number, since it is smaller than the sum of its proper divisors (196636300).

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

129579380 is a wasteful number, since it uses less digits than its factorization.

129579380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 129579380 is about 11383.2938993948. The cubic root of 129579380 is about 506.0327588971.

The spelling of 129579380 in words is "one hundred twenty-nine million, five hundred seventy-nine thousand, three hundred eighty".