129863808 has 96 divisors (see below), whose sum is σ = 376849200. Its totient is φ = 42923520.

The previous prime is 129863801. The next prime is 129863813. The reversal of 129863808 is 808368921.

129863808 is a `hidden beast` number, since 1 + 2 + 9 + 8 + 638 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (129863801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159723 + ... + 160533.

Almost surely, 2^129863808 is an apocalyptic number.

129863808 is a gapful number since it is divisible by the number (18) 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 129863808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188424600).

129863808 is an abundant number, since it is smaller than the sum of its proper divisors (246985392).

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

129863808 is a wasteful number, since it uses less digits than its factorization.

129863808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 129863808 is about 11395.7802716620. The cubic root of 129863808 is about 506.4027372702.

The spelling of 129863808 in words is "one hundred twenty-nine million, eight hundred sixty-three thousand, eight hundred eight".