129033444 has 12 divisors (see below), whose sum is σ = 301078064. Its totient is φ = 43011144.

The previous prime is 129033419. The next prime is 129033449. The reversal of 129033444 is 444330921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×129033444² = 33299259341002272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129033449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5376382 + ... + 5376405.

Almost surely, 2^129033444 is an apocalyptic number.

It is an amenable number.

129033444 is an abundant number, since it is smaller than the sum of its proper divisors (172044620).

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

129033444 is a wasteful number, since it uses less digits than its factorization.

129033444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752794 (or 10752792 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 129033444 is about 11359.2888861935. The cubic root of 129033444 is about 505.3210963188.

The spelling of 129033444 in words is "one hundred twenty-nine million, thirty-three thousand, four hundred forty-four".