129083380 has 96 divisors (see below), whose sum is σ = 305206272. Its totient is φ = 45619200.

The previous prime is 129083371. The next prime is 129083389. The reversal of 129083380 is 83380921.

It is an interprime number because it is at equal distance from previous prime (129083371) and next prime (129083389).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129083389) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 389815 + ... + 390145.

It is an arithmetic number, because the mean of its divisors is an integer number (3179232).

Almost surely, 2^129083380 is an apocalyptic number.

129083380 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 129083380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152603136).

129083380 is an abundant number, since it is smaller than the sum of its proper divisors (176122892).

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

129083380 is a wasteful number, since it uses less digits than its factorization.

129083380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 129083380 is about 11361.4866984915. The cubic root of 129083380 is about 505.3862744076.

The spelling of 129083380 in words is "one hundred twenty-nine million, eighty-three thousand, three hundred eighty".