516638 has 4 divisors (see below), whose sum is σ = 774960. Its totient is φ = 258318.

The previous prime is 516623. The next prime is 516643. The reversal of 516638 is 836615.

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

It is a super-5 number, since 5×516638⁵ (a number of 30 digits) contains 55555 as substring.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 516638.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 516638.

It is an unprimeable number.

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, 129158 + ... + 129161.

It is an arithmetic number, because the mean of its divisors is an integer number (193740).

2⁵¹⁶⁶³⁸ is an apocalyptic number.

516638 is a deficient number, since it is larger than the sum of its proper divisors (258322).

516638 is a wasteful number, since it uses less digits than its factorization.

516638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258321.

The product of its digits is 4320, while the sum is 29.

The square root of 516638 is about 718.7753473791. The cubic root of 516638 is about 80.2408367432.

The spelling of 516638 in words is "five hundred sixteen thousand, six hundred thirty-eight".