129936620 has 48 divisors (see below), whose sum is σ = 298867968. Its totient is φ = 47060160.

The previous prime is 129936607. The next prime is 129936643. The reversal of 129936620 is 26639921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61217 + ... + 63303.

It is an arithmetic number, because the mean of its divisors is an integer number (6226416).

Almost surely, 2^129936620 is an apocalyptic number.

129936620 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 129936620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149433984).

129936620 is an abundant number, since it is smaller than the sum of its proper divisors (168931348).

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

129936620 is a wasteful number, since it uses less digits than its factorization.

129936620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 129936620 is about 11398.9745152799. The cubic root of 129936620 is about 506.4973628313.

The spelling of 129936620 in words is "one hundred twenty-nine million, nine hundred thirty-six thousand, six hundred twenty".