404220073 has 4 divisors (see below), whose sum is σ = 405520128. Its totient is φ = 402920020.

The previous prime is 404220071. The next prime is 404220083. The reversal of 404220073 is 370022404.

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 404220073 - 2¹ = 404220071 is a prime.

It is a super-2 number, since 2×404220073² = 326787734832250658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404220071) 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, 649561 + ... + 650182.

It is an arithmetic number, because the mean of its divisors is an integer number (101380032).

Almost surely, 2^404220073 is an apocalyptic number.

It is an amenable number.

404220073 is a deficient number, since it is larger than the sum of its proper divisors (1300055).

404220073 is a wasteful number, since it uses less digits than its factorization.

404220073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300054.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 404220073 is about 20105.2250173929. The cubic root of 404220073 is about 739.3883873834.

Adding to 404220073 its reverse (370022404), we get a palindrome (774242477).

The spelling of 404220073 in words is "four hundred four million, two hundred twenty thousand, seventy-three".