518228636 has 24 divisors (see below), whose sum is σ = 913768800. Its totient is φ = 257159232.

The previous prime is 518228621. The next prime is 518228639. The reversal of 518228636 is 636822815.

It is a junction number, because it is equal to n+sod(n) for n = 518228593 and 518228602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518228639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519290 + ... + 520286.

It is an arithmetic number, because the mean of its divisors is an integer number (38073700).

Almost surely, 2^518228636 is an apocalyptic number.

It is an amenable number.

518228636 is a deficient number, since it is larger than the sum of its proper divisors (395540164).

518228636 is a wasteful number, since it uses less digits than its factorization.

518228636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1851 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 518228636 is about 22764.6356439105. The cubic root of 518228636 is about 803.2310143650.

The spelling of 518228636 in words is "five hundred eighteen million, two hundred twenty-eight thousand, six hundred thirty-six".