129028680 has 128 divisors (see below), whose sum is σ = 469238400. Its totient is φ = 31276800.

The previous prime is 129028673. The next prime is 129028717. The reversal of 129028680 is 86820921.

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

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, 6450 + ... + 17310.

It is an arithmetic number, because the mean of its divisors is an integer number (3665925).

Almost surely, 2^129028680 is an apocalyptic number.

129028680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129028680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234619200).

129028680 is an abundant number, since it is smaller than the sum of its proper divisors (340209720).

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

129028680 is a wasteful number, since it uses less digits than its factorization.

129028680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10892 (or 10882 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 129028680 is about 11359.0791880328. The cubic root of 129028680 is about 505.3148773127.

The spelling of 129028680 in words is "one hundred twenty-nine million, twenty-eight thousand, six hundred eighty".