129481408 has 28 divisors (see below), whose sum is σ = 293646352. Its totient is φ = 55491840.

The previous prime is 129481397. The next prime is 129481423. The reversal of 129481408 is 804184921.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144063 + ... + 144958.

Almost surely, 2^129481408 is an apocalyptic number.

It is an amenable number.

129481408 is an abundant number, since it is smaller than the sum of its proper divisors (164164944).

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

129481408 is an equidigital number, since it uses as much as digits as its factorization.

129481408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289040 (or 289030 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 129481408 is about 11378.9897618374. The cubic root of 129481408 is about 505.9051934841.

The spelling of 129481408 in words is "one hundred twenty-nine million, four hundred eighty-one thousand, four hundred eight".