129552028 has 12 divisors (see below), whose sum is σ = 226796920. Its totient is φ = 64752912.

The previous prime is 129552011. The next prime is 129552029. The reversal of 129552028 is 820255921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129551984 and 129552002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129552029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15775 + ... + 22537.

Almost surely, 2^129552028 is an apocalyptic number.

It is an amenable number.

129552028 is a deficient number, since it is larger than the sum of its proper divisors (97244892).

129552028 is a wasteful number, since it uses less digits than its factorization.

129552028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11556 (or 11554 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 129552028 is about 11382.0924262633. The cubic root of 129552028 is about 505.9971514262.

The spelling of 129552028 in words is "one hundred twenty-nine million, five hundred fifty-two thousand, twenty-eight".