129772392 has 32 divisors (see below), whose sum is σ = 328879680. Its totient is φ = 42664320.

The previous prime is 129772387. The next prime is 129772393. The reversal of 129772392 is 293277921.

It is not an unprimeable number, because it can be changed into a prime (129772393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35284 + ... + 38787.

It is an arithmetic number, because the mean of its divisors is an integer number (10277490).

Almost surely, 2^129772392 is an apocalyptic number.

129772392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129772392 is an abundant number, since it is smaller than the sum of its proper divisors (199107288).

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

129772392 is a wasteful number, since it uses less digits than its factorization.

129772392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74153 (or 74149 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 129772392 is about 11391.7686072006. The cubic root of 129772392 is about 506.2838840908.

The spelling of 129772392 in words is "one hundred twenty-nine million, seven hundred seventy-two thousand, three hundred ninety-two".