129738444 has 24 divisors (see below), whose sum is σ = 330243648. Its totient is φ = 39314640.

The previous prime is 129738437. The next prime is 129738451. The reversal of 129738444 is 444837921.

It is an interprime number because it is at equal distance from previous prime (129738437) and next prime (129738451).

It is a super-2 number, since 2×129738444² = 33664127703082272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129738396 and 129738405.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 491302 + ... + 491565.

It is an arithmetic number, because the mean of its divisors is an integer number (13760152).

Almost surely, 2^129738444 is an apocalyptic number.

It is an amenable number.

129738444 is an abundant number, since it is smaller than the sum of its proper divisors (200505204).

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

129738444 is a wasteful number, since it uses less digits than its factorization.

129738444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982885 (or 982883 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 129738444 is about 11390.2784864989. The cubic root of 129738444 is about 506.2397328812.

The spelling of 129738444 in words is "one hundred twenty-nine million, seven hundred thirty-eight thousand, four hundred forty-four".