129603870 has 192 divisors, whose sum is σ = 392491008. Its totient is φ = 29376000.

The previous prime is 129603787. The next prime is 129603913. The reversal of 129603870 is 78306921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1258239 + ... + 1258341.

It is an arithmetic number, because the mean of its divisors is an integer number (2044224).

Almost surely, 2^129603870 is an apocalyptic number.

129603870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129603870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196245504).

129603870 is an abundant number, since it is smaller than the sum of its proper divisors (262887138).

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

129603870 is a wasteful number, since it uses less digits than its factorization.

129603870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 129603870 is about 11384.3695477615. The cubic root of 129603870 is about 506.0646362982.

The spelling of 129603870 in words is "one hundred twenty-nine million, six hundred three thousand, eight hundred seventy".