428149446218 has 32 divisors (see below), whose sum is σ = 693410533200. Its totient is φ = 197098237440.

The previous prime is 428149446187. The next prime is 428149446233. The reversal of 428149446218 is 812644941824.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 164895281329 + 263254164889 = 406073^2 + 513083^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 428149446218.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16550558 + ... + 16576406.

Almost surely, 2^428149446218 is an apocalyptic number.

428149446218 is a deficient number, since it is larger than the sum of its proper divisors (265261086982).

428149446218 is a wasteful number, since it uses less digits than its factorization.

428149446218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27482.

The product of its digits is 3538944, while the sum is 53.

The spelling of 428149446218 in words is "four hundred twenty-eight billion, one hundred forty-nine million, four hundred forty-six thousand, two hundred eighteen".