129486984 has 32 divisors (see below), whose sum is σ = 353147040. Its totient is φ = 39238400.

The previous prime is 129486971. The next prime is 129486991. The reversal of 129486984 is 489684921.

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, 244977 + ... + 245504.

It is an arithmetic number, because the mean of its divisors is an integer number (11035845).

Almost surely, 2^129486984 is an apocalyptic number.

It is an amenable number.

129486984 is an abundant number, since it is smaller than the sum of its proper divisors (223660056).

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

129486984 is a wasteful number, since it uses less digits than its factorization.

129486984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490501 (or 490497 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 129486984 is about 11379.2347721628. The cubic root of 129486984 is about 505.9124554967.

The spelling of 129486984 in words is "one hundred twenty-nine million, four hundred eighty-six thousand, nine hundred eighty-four".