129628516 has 6 divisors (see below), whose sum is σ = 226849910. Its totient is φ = 64814256.

The previous prime is 129628489. The next prime is 129628523. The reversal of 129628516 is 615826921.

It can be written as a sum of positive squares in only one way, i.e., 127238400 + 2390116 = 11280^2 + 1546^2 .

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, 16203561 + ... + 16203568.

Almost surely, 2^129628516 is an apocalyptic number.

It is an amenable number.

129628516 is a deficient number, since it is larger than the sum of its proper divisors (97221394).

129628516 is a wasteful number, since it uses less digits than its factorization.

129628516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32407133 (or 32407131 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 129628516 is about 11385.4519453555. The cubic root of 129628516 is about 506.0967127028.

The spelling of 129628516 in words is "one hundred twenty-nine million, six hundred twenty-eight thousand, five hundred sixteen".