404010081 has 12 divisors (see below), whose sum is σ = 583748308. Its totient is φ = 269257824.

The previous prime is 404010077. The next prime is 404010109. The reversal of 404010081 is 180010404.

It can be written as a sum of positive squares in 2 ways, for example, as 88059456 + 315950625 = 9384^2 + 17775^2 .

It is not a de Polignac number, because 404010081 - 2² = 404010077 is a prime.

It is a super-2 number, since 2×404010081² = 326448291099253122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404010001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44571 + ... + 52863.

Almost surely, 2^404010081 is an apocalyptic number.

It is an amenable number.

404010081 is a deficient number, since it is larger than the sum of its proper divisors (179738227).

404010081 is a wasteful number, since it uses less digits than its factorization.

404010081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13712 (or 13709 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 404010081 is about 20100.0020149253. The cubic root of 404010081 is about 739.2603279828.

Adding to 404010081 its reverse (180010404), we get a palindrome (584020485).

It can be divided in two parts, 4040100 and 81, that multiplied together give a square (327248100 = 18090²).

The spelling of 404010081 in words is "four hundred four million, ten thousand, eighty-one".