129984480 has 96 divisors (see below), whose sum is σ = 454960800. Its totient is φ = 34661376.

The previous prime is 129984479. The next prime is 129984487. The reversal of 129984480 is 84489921.

129984480 is a `hidden beast` number, since 1 + 2 + 99 + 84 + 480 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129984487) 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, 10725 + ... + 19364.

It is an arithmetic number, because the mean of its divisors is an integer number (4739175).

Almost surely, 2^129984480 is an apocalyptic number.

129984480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129984480 is an abundant number, since it is smaller than the sum of its proper divisors (324976320).

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

129984480 is a wasteful number, since it uses less digits than its factorization.

129984480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30113 (or 30099 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 129984480 is about 11401.0736336540. The cubic root of 129984480 is about 506.5595418335.

The spelling of 129984480 in words is "one hundred twenty-nine million, nine hundred eighty-four thousand, four hundred eighty".