5091728 has 10 divisors (see below), whose sum is σ = 9865254. Its totient is φ = 2545856.

The previous prime is 5091707. The next prime is 5091743. The reversal of 5091728 is 8271905.

It can be written as a sum of positive squares in only one way, i.e., 3810304 + 1281424 = 1952^2 + 1132^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 5091694 and 5091703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159101 + ... + 159132.

Almost surely, 2^5091728 is an apocalyptic number.

It is an amenable number.

5091728 is a deficient number, since it is larger than the sum of its proper divisors (4773526).

5091728 is a wasteful number, since it uses less digits than its factorization.

5091728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318241 (or 318235 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 5091728 is about 2256.4857633054. The cubic root of 5091728 is about 172.0369489757.

The spelling of 5091728 in words is "five million, ninety-one thousand, seven hundred twenty-eight".