129772680 has 128 divisors (see below), whose sum is σ = 408240000. Its totient is φ = 32958464.

The previous prime is 129772637. The next prime is 129772723. The reversal of 129772680 is 86277921.

It is an interprime number because it is at equal distance from previous prime (129772637) and next prime (129772723).

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, 309511 + ... + 309929.

It is an arithmetic number, because the mean of its divisors is an integer number (3189375).

Almost surely, 2^129772680 is an apocalyptic number.

129772680 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 129772680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204120000).

129772680 is an abundant number, since it is smaller than the sum of its proper divisors (278467320).

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

129772680 is a wasteful number, since it uses less digits than its factorization.

129772680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 129772680 is about 11391.7812478997. The cubic root of 129772680 is about 506.2842586175.

The spelling of 129772680 in words is "one hundred twenty-nine million, seven hundred seventy-two thousand, six hundred eighty".