8490728 has 16 divisors (see below), whose sum is σ = 15964260. Its totient is φ = 4233600.

The previous prime is 8490721. The next prime is 8490761. The reversal of 8490728 is 8270948.

It can be written as a sum of positive squares in 2 ways, for example, as 4656964 + 3833764 = 2158^2 + 1958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8490691 and 8490700.

It is not an unprimeable number, because it can be changed into a prime (8490721) 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, 2108 + ... + 4628.

Almost surely, 2^8490728 is an apocalyptic number.

It is an amenable number.

8490728 is a deficient number, since it is larger than the sum of its proper divisors (7473532).

8490728 is a wasteful number, since it uses less digits than its factorization.

8490728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 8490728 is about 2913.8853786654. The cubic root of 8490728 is about 204.0085220072.

The spelling of 8490728 in words is "eight million, four hundred ninety thousand, seven hundred twenty-eight".