129862720 has 224 divisors, whose sum is σ = 368686080. Its totient is φ = 43130880.

The previous prime is 129862657. The next prime is 129862741. The reversal of 129862720 is 27268921.

It is a self number, because there is not a number n which added to its sum of digits gives 129862720.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2450214 + ... + 2450266.

It is an arithmetic number, because the mean of its divisors is an integer number (1645920).

Almost surely, 2^129862720 is an apocalyptic number.

129862720 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 129862720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184343040).

129862720 is an abundant number, since it is smaller than the sum of its proper divisors (238823360).

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

129862720 is a wasteful number, since it uses less digits than its factorization.

129862720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 129862720 is about 11395.7325345938. The cubic root of 129862720 is about 506.4013230509.

The spelling of 129862720 in words is "one hundred twenty-nine million, eight hundred sixty-two thousand, seven hundred twenty".