129103392 has 96 divisors (see below), whose sum is σ = 372314880. Its totient is φ = 38846720.

The previous prime is 129103379. The next prime is 129103399. The reversal of 129103392 is 293301921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (129103399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188683 + ... + 189365.

It is an arithmetic number, because the mean of its divisors is an integer number (3878280).

Almost surely, 2^129103392 is an apocalyptic number.

129103392 is a gapful number since it is divisible by the number (12) 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 129103392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186157440).

129103392 is an abundant number, since it is smaller than the sum of its proper divisors (243211488).

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

129103392 is a wasteful number, since it uses less digits than its factorization.

129103392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 129103392 is about 11362.3673589618. The cubic root of 129103392 is about 505.4123900018.

The spelling of 129103392 in words is "one hundred twenty-nine million, one hundred three thousand, three hundred ninety-two".