518634 has 12 divisors (see below), whose sum is σ = 1123746. Its totient is φ = 172872.

The previous prime is 518621. The next prime is 518657. The reversal of 518634 is 436815.

It can be written as a sum of positive squares in only one way, i.e., 497025 + 21609 = 705^2 + 147^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 518598 and 518607.

It is an unprimeable number.

518634 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14389 + ... + 14424.

2⁵¹⁸⁶³⁴ is an apocalyptic number.

518634 is an abundant number, since it is smaller than the sum of its proper divisors (605112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

518634 is a wasteful number, since it uses less digits than its factorization.

518634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28821 (or 28818 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 518634 is about 720.1624816665. The cubic root of 518634 is about 80.3440391755.

The spelling of 518634 in words is "five hundred eighteen thousand, six hundred thirty-four".