129938862 has 32 divisors (see below), whose sum is σ = 269926272. Its totient is φ = 41668704.

The previous prime is 129938833. The next prime is 129938869. The reversal of 129938862 is 268839921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129938869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13528 + ... + 21044.

It is an arithmetic number, because the mean of its divisors is an integer number (8435196).

Almost surely, 2^129938862 is an apocalyptic number.

129938862 is an abundant number, since it is smaller than the sum of its proper divisors (139987410).

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

129938862 is a wasteful number, since it uses less digits than its factorization.

129938862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632.

The product of its digits is 373248, while the sum is 48.

The square root of 129938862 is about 11399.0728570353. The cubic root of 129938862 is about 506.5002759453.

The spelling of 129938862 in words is "one hundred twenty-nine million, nine hundred thirty-eight thousand, eight hundred sixty-two".