129325780 has 48 divisors (see below), whose sum is σ = 298327680. Its totient is φ = 46873728.

The previous prime is 129325771. The next prime is 129325787. The reversal of 129325780 is 87523921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129325787) 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, 1342 + ... + 16138.

It is an arithmetic number, because the mean of its divisors is an integer number (6215160).

Almost surely, 2^129325780 is an apocalyptic number.

129325780 is a gapful number since it is divisible by the number (10) 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 129325780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149163840).

129325780 is an abundant number, since it is smaller than the sum of its proper divisors (169001900).

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

129325780 is a wasteful number, since it uses less digits than its factorization.

129325780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14848 (or 14846 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 129325780 is about 11372.1493131246. The cubic root of 129325780 is about 505.7024241452.

The spelling of 129325780 in words is "one hundred twenty-nine million, three hundred twenty-five thousand, seven hundred eighty".