129417444 has 144 divisors (see below), whose sum is σ = 369969600. Its totient is φ = 37884672.

The previous prime is 129417439. The next prime is 129417473. The reversal of 129417444 is 444714921.

It is a super-2 number, since 2×129417444² = 33497749622986272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 129417399 and 129417408.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1187262 + ... + 1187370.

Almost surely, 2^129417444 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 129417444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184984800).

129417444 is an abundant number, since it is smaller than the sum of its proper divisors (240552156).

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

129417444 is a wasteful number, since it uses less digits than its factorization.

129417444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 229 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 129417444 is about 11376.1787960633. The cubic root of 129417444 is about 505.8218738005.

The spelling of 129417444 in words is "one hundred twenty-nine million, four hundred seventeen thousand, four hundred forty-four".