404243441 has 16 divisors (see below), whose sum is σ = 493347840. Its totient is φ = 323749440.

The previous prime is 404243431. The next prime is 404243461. The reversal of 404243441 is 144342404.

It is a happy number.

It is not a de Polignac number, because 404243441 - 2¹⁸ = 403981297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 404243441.

It is not an unprimeable number, because it can be changed into a prime (404243431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25826 + ... + 38411.

It is an arithmetic number, because the mean of its divisors is an integer number (30834240).

Almost surely, 2^404243441 is an apocalyptic number.

It is an amenable number.

404243441 is a deficient number, since it is larger than the sum of its proper divisors (89104399).

404243441 is a wasteful number, since it uses less digits than its factorization.

404243441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64304.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 404243441 is about 20105.8061514578. The cubic root of 404243441 is about 739.4026351460.

Adding to 404243441 its reverse (144342404), we get a palindrome (548585845).

The spelling of 404243441 in words is "four hundred four million, two hundred forty-three thousand, four hundred forty-one".