129404480 has 28 divisors (see below), whose sum is σ = 308145180. Its totient is φ = 51761664.

The previous prime is 129404479. The next prime is 129404507. The reversal of 129404480 is 84404921.

It can be written as a sum of positive squares in 2 ways, for example, as 42094144 + 87310336 = 6488^2 + 9344^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201875 + ... + 202514.

It is an arithmetic number, because the mean of its divisors is an integer number (11005185).

Almost surely, 2^129404480 is an apocalyptic number.

129404480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129404480 is an abundant number, since it is smaller than the sum of its proper divisors (178740700).

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

129404480 is an equidigital number, since it uses as much as digits as its factorization.

129404480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404406 (or 404396 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 129404480 is about 11375.6089946868. The cubic root of 129404480 is about 505.8049835124.

The spelling of 129404480 in words is "one hundred twenty-nine million, four hundred four thousand, four hundred eighty".