220404634 has 16 divisors (see below), whose sum is σ = 345954888. Its totient is φ = 105198912.

The previous prime is 220404619. The next prime is 220404647. The reversal of 220404634 is 436404022.

220404634 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 186240609 + 34164025 = 13647^2 + 5845^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220404599 and 220404608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24177 + ... + 32020.

Almost surely, 2^220404634 is an apocalyptic number.

220404634 is a deficient number, since it is larger than the sum of its proper divisors (125550254).

220404634 is a wasteful number, since it uses less digits than its factorization.

220404634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56289.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 220404634 is about 14846.0309173866. The cubic root of 220404634 is about 604.0509528964.

Adding to 220404634 its reverse (436404022), we get a palindrome (656808656).

The spelling of 220404634 in words is "two hundred twenty million, four hundred four thousand, six hundred thirty-four".