404420111 has 4 divisors (see below), whose sum is σ = 425705400. Its totient is φ = 383134824.

The previous prime is 404420099. The next prime is 404420119. The reversal of 404420111 is 111024404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404420111 is a prime.

It is a super-3 number, since 3×404420111³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404420111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404420119) 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, 10642616 + ... + 10642653.

It is an arithmetic number, because the mean of its divisors is an integer number (106426350).

Almost surely, 2^404420111 is an apocalyptic number.

404420111 is a deficient number, since it is larger than the sum of its proper divisors (21285289).

404420111 is a wasteful number, since it uses less digits than its factorization.

404420111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21285288.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 404420111 is about 20110.1991785263. The cubic root of 404420111 is about 739.5103352962.

Adding to 404420111 its reverse (111024404), we get a palindrome (515444515).

The spelling of 404420111 in words is "four hundred four million, four hundred twenty thousand, one hundred eleven".