434649218 has 4 divisors (see below), whose sum is σ = 651973830. Its totient is φ = 217324608.

The previous prime is 434649191. The next prime is 434649307. The reversal of 434649218 is 812946434.

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., 409779049 + 24870169 = 20243^2 + 4987^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108662303 + ... + 108662306.

Almost surely, 2^434649218 is an apocalyptic number.

434649218 is a deficient number, since it is larger than the sum of its proper divisors (217324612).

434649218 is a wasteful number, since it uses less digits than its factorization.

434649218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217324611.

The product of its digits is 165888, while the sum is 41.

The square root of 434649218 is about 20848.2425638230. The cubic root of 434649218 is about 757.4947622057.

The spelling of 434649218 in words is "four hundred thirty-four million, six hundred forty-nine thousand, two hundred eighteen".