129102984 has 128 divisors (see below), whose sum is σ = 373132800. Its totient is φ = 41850432.

The previous prime is 129102959. The next prime is 129102991. The reversal of 129102984 is 489201921.

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 31 ways as a sum of consecutive naturals, for example, 822234 + ... + 822390.

It is an arithmetic number, because the mean of its divisors is an integer number (2915100).

Almost surely, 2^129102984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129102984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186566400).

129102984 is an abundant number, since it is smaller than the sum of its proper divisors (244029816).

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

129102984 is an equidigital number, since it uses as much as digits as its factorization.

129102984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 129102984 is about 11362.3494049426. The cubic root of 129102984 is about 505.4118575901.

The spelling of 129102984 in words is "one hundred twenty-nine million, one hundred two thousand, nine hundred eighty-four".