129604020 has 144 divisors (see below), whose sum is σ = 454745088. Its totient is φ = 27336960.

The previous prime is 129604019. The next prime is 129604093. The reversal of 129604020 is 20406921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36525 + ... + 39915.

It is an arithmetic number, because the mean of its divisors is an integer number (3157952).

Almost surely, 2^129604020 is an apocalyptic number.

129604020 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 129604020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227372544).

129604020 is an abundant number, since it is smaller than the sum of its proper divisors (325141068).

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

129604020 is a wasteful number, since it uses less digits than its factorization.

129604020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3430 (or 3421 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 129604020 is about 11384.3761357397. The cubic root of 129604020 is about 506.0648315333.

The spelling of 129604020 in words is "one hundred twenty-nine million, six hundred four thousand, twenty".