129236016 has 80 divisors (see below), whose sum is σ = 410918144. Its totient is φ = 34083072.

The previous prime is 129235987. The next prime is 129236039. The reversal of 129236016 is 610632921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10426 + ... + 19161.

Almost surely, 2^129236016 is an apocalyptic number.

129236016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129236016 is an abundant number, since it is smaller than the sum of its proper divisors (281682128).

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

129236016 is a wasteful number, since it uses less digits than its factorization.

129236016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29618 (or 29612 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 129236016 is about 11368.2019686492. The cubic root of 129236016 is about 505.5853957153.

Adding to 129236016 its reverse (610632921), we get a palindrome (739868937).

The spelling of 129236016 in words is "one hundred twenty-nine million, two hundred thirty-six thousand, sixteen".