129745044 has 192 divisors, whose sum is σ = 409436160. Its totient is φ = 34992000.

The previous prime is 129744997. The next prime is 129745067. The reversal of 129745044 is 440547921.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 478629 + ... + 478899.

It is an arithmetic number, because the mean of its divisors is an integer number (2132480).

Almost surely, 2^129745044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129745044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204718080).

129745044 is an abundant number, since it is smaller than the sum of its proper divisors (279691116).

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

129745044 is a wasteful number, since it uses less digits than its factorization.

129745044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 129745044 is about 11390.5682035621. The cubic root of 129745044 is about 506.2483171412.

The spelling of 129745044 in words is "one hundred twenty-nine million, seven hundred forty-five thousand, forty-four".