129229444 has 12 divisors (see below), whose sum is σ = 239454684. Its totient is φ = 60813824.

The previous prime is 129229409. The next prime is 129229487. The reversal of 129229444 is 444922921.

It can be written as a sum of positive squares in 2 ways, for example, as 78535044 + 50694400 = 8862^2 + 7120^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950149 + ... + 950284.

It is an arithmetic number, because the mean of its divisors is an integer number (19954557).

Almost surely, 2^129229444 is an apocalyptic number.

It is an amenable number.

129229444 is a deficient number, since it is larger than the sum of its proper divisors (110225240).

129229444 is a wasteful number, since it uses less digits than its factorization.

129229444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900454 (or 1900452 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 129229444 is about 11367.9129131077. The cubic root of 129229444 is about 505.5768254430.

It can be divided in two parts, 12922 and 9444, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 129229444 in words is "one hundred twenty-nine million, two hundred twenty-nine thousand, four hundred forty-four".