129408480 has 72 divisors (see below), whose sum is σ = 441611352. Its totient is φ = 34508544.

The previous prime is 129408473. The next prime is 129408491. The reversal of 129408480 is 84804921.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43494 + ... + 46373.

It is an arithmetic number, because the mean of its divisors is an integer number (6133491).

Almost surely, 2^129408480 is an apocalyptic number.

129408480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129408480 is an abundant number, since it is smaller than the sum of its proper divisors (312202872).

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

129408480 is a wasteful number, since it uses less digits than its factorization.

129408480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89888 (or 89877 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 129408480 is about 11375.7848080913. The cubic root of 129408480 is about 505.8101950761.

The spelling of 129408480 in words is "one hundred twenty-nine million, four hundred eight thousand, four hundred eighty".