129885696 has 120 divisors (see below), whose sum is σ = 381096144. Its totient is φ = 42577920.

The previous prime is 129885673. The next prime is 129885713. The reversal of 129885696 is 696588921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 326970 + ... + 327366.

Almost surely, 2^129885696 is an apocalyptic number.

129885696 is a gapful number since it is divisible by the number (16) 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 129885696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190548072).

129885696 is an abundant number, since it is smaller than the sum of its proper divisors (251210448).

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

129885696 is an equidigital number, since it uses as much as digits as its factorization.

129885696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 473 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 129885696 is about 11396.7405866765. The cubic root of 129885696 is about 506.4311863576.

The spelling of 129885696 in words is "one hundred twenty-nine million, eight hundred eighty-five thousand, six hundred ninety-six".