129628811 has 16 divisors (see below), whose sum is σ = 152023200. Its totient is φ = 109444608.

The previous prime is 129628781. The next prime is 129628817. The reversal of 129628811 is 118826921.

It is not a de Polignac number, because 129628811 - 2¹⁰ = 129627787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129628817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1886 + ... + 16211.

It is an arithmetic number, because the mean of its divisors is an integer number (9501450).

Almost surely, 2^129628811 is an apocalyptic number.

129628811 is a deficient number, since it is larger than the sum of its proper divisors (22394389).

129628811 is a wasteful number, since it uses less digits than its factorization.

129628811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18158.

The product of its digits is 13824, while the sum is 38.

The square root of 129628811 is about 11385.4649004773. The cubic root of 129628811 is about 506.0970966163.

The spelling of 129628811 in words is "one hundred twenty-nine million, six hundred twenty-eight thousand, eight hundred eleven".