129930444 has 36 divisors (see below), whose sum is σ = 375355344. Its totient is φ = 37122912.

The previous prime is 129930443. The next prime is 129930491. The reversal of 129930444 is 444039921.

129930444 is a `hidden beast` number, since 129 + 93 + 0 + 444 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 129930399 and 129930408.

It is not an unprimeable number, because it can be changed into a prime (129930443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257547 + ... + 258050.

Almost surely, 2^129930444 is an apocalyptic number.

129930444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129930444 is an abundant number, since it is smaller than the sum of its proper divisors (245424900).

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

129930444 is a wasteful number, since it uses less digits than its factorization.

129930444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515614 (or 515609 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 129930444 is about 11398.7036104989. The cubic root of 129930444 is about 506.4893379515.

The spelling of 129930444 in words is "one hundred twenty-nine million, nine hundred thirty thousand, four hundred forty-four".