494505218 has 4 divisors (see below), whose sum is σ = 741757830. Its totient is φ = 247252608.

The previous prime is 494505217. The next prime is 494505227. The reversal of 494505218 is 812505494.

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., 493417369 + 1087849 = 22213^2 + 1043^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (494505217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123626303 + ... + 123626306.

Almost surely, 2^494505218 is an apocalyptic number.

494505218 is a deficient number, since it is larger than the sum of its proper divisors (247252612).

494505218 is a wasteful number, since it uses less digits than its factorization.

494505218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247252611.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 494505218 is about 22237.4732827271. The cubic root of 494505218 is about 790.7823356113.

The spelling of 494505218 in words is "four hundred ninety-four million, five hundred five thousand, two hundred eighteen".