404410991 has 4 divisors (see below), whose sum is σ = 425695800. Its totient is φ = 383126184.

The previous prime is 404410939. The next prime is 404410997. The reversal of 404410991 is 199014404.

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

It is a de Polignac number, because none of the positive numbers 2^k-404410991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404410997) 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, 10642376 + ... + 10642413.

It is an arithmetic number, because the mean of its divisors is an integer number (106423950).

Almost surely, 2^404410991 is an apocalyptic number.

404410991 is a deficient number, since it is larger than the sum of its proper divisors (21284809).

404410991 is a wasteful number, since it uses less digits than its factorization.

404410991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21284808.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 404410991 is about 20109.9724266345. The cubic root of 404410991 is about 739.5047764027.

The spelling of 404410991 in words is "four hundred four million, four hundred ten thousand, nine hundred ninety-one".