129047044 has 48 divisors (see below), whose sum is σ = 264176640. Its totient is φ = 54018720.

The previous prime is 129046987. The next prime is 129047047. The reversal of 129047044 is 440740921.

It is a junction number, because it is equal to n+sod(n) for n = 129046997 and 129047015.

It is not an unprimeable number, because it can be changed into a prime (129047047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276099 + ... + 276565.

It is an arithmetic number, because the mean of its divisors is an integer number (5503680).

Almost surely, 2^129047044 is an apocalyptic number.

129047044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129047044 is an abundant number, since it is smaller than the sum of its proper divisors (135129596).

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

129047044 is a wasteful number, since it uses less digits than its factorization.

129047044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 129047044 is about 11359.8874994429. The cubic root of 129047044 is about 505.3388491464.

Adding to 129047044 its reverse (440740921), we get a palindrome (569787965).

The spelling of 129047044 in words is "one hundred twenty-nine million, forty-seven thousand, forty-four".