129277316 has 48 divisors (see below), whose sum is σ = 282627072. Its totient is φ = 50457600.

The previous prime is 129277303. The next prime is 129277339. The reversal of 129277316 is 613772921.

It is a self number, because there is not a number n which added to its sum of digits gives 129277316.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10376 + ... + 19136.

It is an arithmetic number, because the mean of its divisors is an integer number (5888064).

Almost surely, 2^129277316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129277316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141313536).

129277316 is an abundant number, since it is smaller than the sum of its proper divisors (153349756).

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

129277316 is a wasteful number, since it uses less digits than its factorization.

129277316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820 (or 8818 counting only the distinct ones).

The product of its digits is 31752, while the sum is 38.

The square root of 129277316 is about 11370.0182937408. The cubic root of 129277316 is about 505.6392466814.

The spelling of 129277316 in words is "one hundred twenty-nine million, two hundred seventy-seven thousand, three hundred sixteen".