500728129 has 6 divisors (see below), whose sum is σ = 550387250. Its totient is φ = 455207280.

The previous prime is 500728117. The next prime is 500728133. The reversal of 500728129 is 921827005.

It can be written as a sum of positive squares in only one way, i.e., 468635904 + 32092225 = 21648^2 + 5665^2 .

It is not a de Polignac number, because 500728129 - 2⁷ = 500728001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 500728094 and 500728103.

It is not an unprimeable number, because it can be changed into a prime (500728169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2069004 + ... + 2069245.

Almost surely, 2^500728129 is an apocalyptic number.

It is an amenable number.

500728129 is a deficient number, since it is larger than the sum of its proper divisors (49659121).

500728129 is a wasteful number, since it uses less digits than its factorization.

500728129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138271 (or 4138260 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 500728129 is about 22376.9553112125. The cubic root of 500728129 is about 794.0856166943.

The spelling of 500728129 in words is "five hundred million, seven hundred twenty-eight thousand, one hundred twenty-nine".