129889962 has 48 divisors (see below), whose sum is σ = 303643080. Its totient is φ = 39975936.

The previous prime is 129889933. The next prime is 129890011. The reversal of 129889962 is 269988921.

It can be written as a sum of positive squares in 4 ways, for example, as 129481641 + 408321 = 11379^2 + 639^2 .

It is a super-2 number, since 2×129889962² = 33742804456722888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129889899 and 129889908.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12214 + ... + 20222.

Almost surely, 2^129889962 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129889962, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151821540).

129889962 is an abundant number, since it is smaller than the sum of its proper divisors (173753118).

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

129889962 is a wasteful number, since it uses less digits than its factorization.

129889962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8087 (or 8084 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 129889962 is about 11396.9277439141. The cubic root of 129889962 is about 506.4367307499.

The spelling of 129889962 in words is "one hundred twenty-nine million, eight hundred eighty-nine thousand, nine hundred sixty-two".