129889960 has 16 divisors (see below), whose sum is σ = 292252500. Its totient is φ = 51955968.

The previous prime is 129889933. The next prime is 129890011. The reversal of 129889960 is 69988921.

It can be written as a sum of positive squares in 2 ways, for example, as 123609924 + 6280036 = 11118^2 + 2506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129889898 and 129889907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623585 + ... + 1623664.

Almost surely, 2^129889960 is an apocalyptic number.

129889960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129889960 is an abundant number, since it is smaller than the sum of its proper divisors (162362540).

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

129889960 is a wasteful number, since it uses less digits than its factorization.

129889960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247260 (or 3247256 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 129889960 is about 11396.9276561712. The cubic root of 129889960 is about 506.4367281506.

The spelling of 129889960 in words is "one hundred twenty-nine million, eight hundred eighty-nine thousand, nine hundred sixty".