129940480 has 88 divisors (see below), whose sum is σ = 319823280. Its totient is φ = 50626560.

The previous prime is 129940463. The next prime is 129940507. The reversal of 129940480 is 84049921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209611 + ... + 210229.

Almost surely, 2^129940480 is an apocalyptic number.

129940480 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 129940480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159911640).

129940480 is an abundant number, since it is smaller than the sum of its proper divisors (189882800).

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

129940480 is an equidigital number, since it uses as much as digits as its factorization.

129940480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 129940480 is about 11399.1438274986. The cubic root of 129940480 is about 506.5023782521.

The spelling of 129940480 in words is "one hundred twenty-nine million, nine hundred forty thousand, four hundred eighty".