5618728 has 8 divisors (see below), whose sum is σ = 10535130. Its totient is φ = 2809360.

The previous prime is 5618713. The next prime is 5618729. The reversal of 5618728 is 8278165.

It can be written as a sum of positive squares in only one way, i.e., 5560164 + 58564 = 2358^2 + 242^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (5618729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351163 + ... + 351178.

Almost surely, 2^5618728 is an apocalyptic number.

It is an amenable number.

5618728 is a deficient number, since it is larger than the sum of its proper divisors (4916402).

5618728 is a wasteful number, since it uses less digits than its factorization.

5618728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702347 (or 702343 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 5618728 is about 2370.3856226361. The cubic root of 5618728 is about 177.7785403902.

The spelling of 5618728 in words is "five million, six hundred eighteen thousand, seven hundred twenty-eight".