129019744 has 72 divisors (see below), whose sum is σ = 298627560. Its totient is φ = 54706176.

The previous prime is 129019741. The next prime is 129019769. The reversal of 129019744 is 447910921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129019741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167392 + ... + 168160.

It is an arithmetic number, because the mean of its divisors is an integer number (4147605).

Almost surely, 2^129019744 is an apocalyptic number.

129019744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129019744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149313780).

129019744 is an abundant number, since it is smaller than the sum of its proper divisors (169607816).

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

129019744 is a wasteful number, since it uses less digits than its factorization.

129019744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 129019744 is about 11358.6858394798. The cubic root of 129019744 is about 505.3032116944.

The spelling of 129019744 in words is "one hundred twenty-nine million, nineteen thousand, seven hundred forty-four".