129630708 has 18 divisors (see below), whose sum is σ = 327677714. Its totient is φ = 43210224.

The previous prime is 129630701. The next prime is 129630727. The reversal of 129630708 is 807036921.

129630708 is a `hidden beast` number, since 12 + 9 + 630 + 7 + 0 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 113806224 + 15824484 = 10668^2 + 3978^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3600853 = 129630708 / (1 + 2 + 9 + 6 + 3 + 0 + 7 + 0 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129630701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1800391 + ... + 1800462.

Almost surely, 2^129630708 is an apocalyptic number.

129630708 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

129630708 is an abundant number, since it is smaller than the sum of its proper divisors (198047006).

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

129630708 is a wasteful number, since it uses less digits than its factorization.

129630708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600863 (or 3600858 counting only the distinct ones).

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

The square root of 129630708 is about 11385.5482081453. The cubic root of 129630708 is about 506.0995653615.

The spelling of 129630708 in words is "one hundred twenty-nine million, six hundred thirty thousand, seven hundred eight".