128630799 has 24 divisors (see below), whose sum is σ = 204602112. Its totient is φ = 77223120.

The previous prime is 128630783. The next prime is 128630849. The reversal of 128630799 is 997036821.

128630799 is a `hidden beast` number, since 1 + 2 + 8 + 630 + 7 + 9 + 9 = 666.

It is not a de Polignac number, because 128630799 - 2⁴ = 128630783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128634799) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4522 + ... + 16664.

It is an arithmetic number, because the mean of its divisors is an integer number (8525088).

Almost surely, 2^128630799 is an apocalyptic number.

128630799 is a deficient number, since it is larger than the sum of its proper divisors (75971313).

128630799 is a wasteful number, since it uses less digits than its factorization.

128630799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12267 (or 12264 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 128630799 is about 11341.5518779398. The cubic root of 128630799 is about 504.7949355301.

The spelling of 128630799 in words is "one hundred twenty-eight million, six hundred thirty thousand, seven hundred ninety-nine".