129798620 has 48 divisors (see below), whose sum is σ = 319128768. Its totient is φ = 43415040.

The previous prime is 129798619. The next prime is 129798629. The reversal of 129798620 is 26897921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129798629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5567 + ... + 17046.

It is an arithmetic number, because the mean of its divisors is an integer number (6648516).

Almost surely, 2^129798620 is an apocalyptic number.

129798620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129798620 is an abundant number, since it is smaller than the sum of its proper divisors (189330148).

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

129798620 is a wasteful number, since it uses less digits than its factorization.

129798620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22670 (or 22668 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 129798620 is about 11392.9197311313. The cubic root of 129798620 is about 506.3179897508.

The spelling of 129798620 in words is "one hundred twenty-nine million, seven hundred ninety-eight thousand, six hundred twenty".