5128456 has 8 divisors (see below), whose sum is σ = 9615870. Its totient is φ = 2564224.

The previous prime is 5128433. The next prime is 5128463. The reversal of 5128456 is 6548215.

It can be written as a sum of positive squares in only one way, i.e., 3348900 + 1779556 = 1830^2 + 1334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320521 + ... + 320536.

Almost surely, 2^5128456 is an apocalyptic number.

It is an amenable number.

5128456 is a deficient number, since it is larger than the sum of its proper divisors (4487414).

5128456 is a wasteful number, since it uses less digits than its factorization.

5128456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641063 (or 641059 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 5128456 is about 2264.6094586043. The cubic root of 5128456 is about 172.4496079088.

The spelling of 5128456 in words is "five million, one hundred twenty-eight thousand, four hundred fifty-six".