129800444 has 6 divisors (see below), whose sum is σ = 227150784. Its totient is φ = 64900220.

The previous prime is 129800443. The next prime is 129800459. The reversal of 129800444 is 444008921.

It is a self number, because there is not a number n which added to its sum of digits gives 129800444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129800443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16225052 + ... + 16225059.

It is an arithmetic number, because the mean of its divisors is an integer number (37858464).

Almost surely, 2^129800444 is an apocalyptic number.

It is an amenable number.

129800444 is a deficient number, since it is larger than the sum of its proper divisors (97350340).

129800444 is a wasteful number, since it uses less digits than its factorization.

129800444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32450115 (or 32450113 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 129800444 is about 11392.9997805670. Note that the first 3 decimals coincide. The cubic root of 129800444 is about 506.3203614239.

The spelling of 129800444 in words is "one hundred twenty-nine million, eight hundred thousand, four hundred forty-four".