129694380 has 96 divisors (see below), whose sum is σ = 395539200. Its totient is φ = 31627008.

The previous prime is 129694363. The next prime is 129694381. The reversal of 129694380 is 83496921.

It is not an unprimeable number, because it can be changed into a prime (129694381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31099 + ... + 35021.

It is an arithmetic number, because the mean of its divisors is an integer number (4120200).

Almost surely, 2^129694380 is an apocalyptic number.

129694380 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 129694380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197769600).

129694380 is an abundant number, since it is smaller than the sum of its proper divisors (265844820).

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

129694380 is a wasteful number, since it uses less digits than its factorization.

129694380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983 (or 3981 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 129694380 is about 11388.3440411677. The cubic root of 129694380 is about 506.1824137788.

The spelling of 129694380 in words is "one hundred twenty-nine million, six hundred ninety-four thousand, three hundred eighty".