129728524 has 12 divisors (see below), whose sum is σ = 231308784. Its totient is φ = 63640304.

The previous prime is 129728509. The next prime is 129728527. The reversal of 129728524 is 425827921.

It is not an unprimeable number, because it can be changed into a prime (129728527) 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, 305752 + ... + 306175.

It is an arithmetic number, because the mean of its divisors is an integer number (19275732).

Almost surely, 2^129728524 is an apocalyptic number.

It is an amenable number.

129728524 is a deficient number, since it is larger than the sum of its proper divisors (101580260).

129728524 is a wasteful number, since it uses less digits than its factorization.

129728524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611984 (or 611982 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 129728524 is about 11389.8430191114. The cubic root of 129728524 is about 506.2268299308.

The spelling of 129728524 in words is "one hundred twenty-nine million, seven hundred twenty-eight thousand, five hundred twenty-four".