220440466 has 4 divisors (see below), whose sum is σ = 330660702. Its totient is φ = 110220232.

The previous prime is 220440463. The next prime is 220440491. The reversal of 220440466 is 664044022.

220440466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 664044022 = 2 ⋅332022011.

It can be written as a sum of positive squares in only one way, i.e., 167573025 + 52867441 = 12945^2 + 7271^2 .

It is not an unprimeable number, because it can be changed into a prime (220440463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55110115 + ... + 55110118.

Almost surely, 2^220440466 is an apocalyptic number.

220440466 is a deficient number, since it is larger than the sum of its proper divisors (110220236).

220440466 is a wasteful number, since it uses less digits than its factorization.

220440466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110220235.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 220440466 is about 14847.2376555371. The cubic root of 220440466 is about 604.0836853917.

Adding to 220440466 its reverse (664044022), we get a palindrome (884484488).

The spelling of 220440466 in words is "two hundred twenty million, four hundred forty thousand, four hundred sixty-six".