129628312 has 16 divisors (see below), whose sum is σ = 265149000. Its totient is φ = 58921920.

The previous prime is 129628309. The next prime is 129628313. The reversal of 129628312 is 213826921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129628313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736437 + ... + 736612.

Almost surely, 2^129628312 is an apocalyptic number.

It is an amenable number.

129628312 is an abundant number, since it is smaller than the sum of its proper divisors (135520688).

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

129628312 is a wasteful number, since it uses less digits than its factorization.

129628312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473066 (or 1473062 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 129628312 is about 11385.4429865509. The cubic root of 129628312 is about 506.0964472165.

The spelling of 129628312 in words is "one hundred twenty-nine million, six hundred twenty-eight thousand, three hundred twelve".