220438669 has 4 divisors (see below), whose sum is σ = 240478560. Its totient is φ = 200398780.

The previous prime is 220438667. The next prime is 220438681. The reversal of 220438669 is 966834022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220438669 - 2¹ = 220438667 is a prime.

It is a super-2 number, since 2×220438669² = 97186413580983122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220438667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10019929 + ... + 10019950.

It is an arithmetic number, because the mean of its divisors is an integer number (60119640).

Almost surely, 2^220438669 is an apocalyptic number.

It is an amenable number.

220438669 is a deficient number, since it is larger than the sum of its proper divisors (20039891).

220438669 is a wasteful number, since it uses less digits than its factorization.

220438669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20039890.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 220438669 is about 14847.1771391063. The cubic root of 220438669 is about 604.0820439185.

The spelling of 220438669 in words is "two hundred twenty million, four hundred thirty-eight thousand, six hundred sixty-nine".