404045081 has 16 divisors (see below), whose sum is σ = 458049600. Its totient is φ = 353035200.

The previous prime is 404045077. The next prime is 404045087. The reversal of 404045081 is 180540404.

It is a cyclic number.

It is not a de Polignac number, because 404045081 - 2² = 404045077 is a prime.

It is a super-2 number, since 2×404045081² = 326504854960593122, which contains 22 as substring.

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 404045081.

It is not an unprimeable number, because it can be changed into a prime (404045087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70286 + ... + 75816.

It is an arithmetic number, because the mean of its divisors is an integer number (28628100).

Almost surely, 2^404045081 is an apocalyptic number.

It is an amenable number.

404045081 is a deficient number, since it is larger than the sum of its proper divisors (54004519).

404045081 is a wasteful number, since it uses less digits than its factorization.

404045081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 404045081 is about 20100.8726427486. The cubic root of 404045081 is about 739.2816751104.

Adding to 404045081 its reverse (180540404), we get a palindrome (584585485).

The spelling of 404045081 in words is "four hundred four million, forty-five thousand, eighty-one".