616306 has 4 divisors (see below), whose sum is σ = 924462. Its totient is φ = 308152.

The previous prime is 616289. The next prime is 616307. The reversal of 616306 is 603616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 81 = 785^2 + 9^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (616307) 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, 154075 + ... + 154078.

2⁶¹⁶³⁰⁶ is an apocalyptic number.

616306 is a deficient number, since it is larger than the sum of its proper divisors (308156).

616306 is a wasteful number, since it uses less digits than its factorization.

616306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308155.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 616306 is about 785.0515906614. The cubic root of 616306 is about 85.1005039547.

The spelling of 616306 in words is "six hundred sixteen thousand, three hundred six".