129888812 has 6 divisors (see below), whose sum is σ = 227305428. Its totient is φ = 64944404.

The previous prime is 129888809. The next prime is 129888851. The reversal of 129888812 is 218888921.

It is a super-2 number, since 2×129888812² = 33742206965542688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16236098 + ... + 16236105.

It is an arithmetic number, because the mean of its divisors is an integer number (37884238).

Almost surely, 2^129888812 is an apocalyptic number.

It is an amenable number.

129888812 is a deficient number, since it is larger than the sum of its proper divisors (97416616).

129888812 is a wasteful number, since it uses less digits than its factorization.

129888812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32472207 (or 32472205 counting only the distinct ones).

The product of its digits is 147456, while the sum is 47.

The square root of 129888812 is about 11396.8772916093. The cubic root of 129888812 is about 506.4352361413.

The spelling of 129888812 in words is "one hundred twenty-nine million, eight hundred eighty-eight thousand, eight hundred twelve".