404240791 has 8 divisors (see below), whose sum is σ = 405964944. Its totient is φ = 402521280.

The previous prime is 404240783. The next prime is 404240803. The reversal of 404240791 is 197042404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404240791 - 2³ = 404240783 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 (404240761) 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 7 ways as a sum of consecutive naturals, for example, 390811 + ... + 391843.

It is an arithmetic number, because the mean of its divisors is an integer number (50745618).

Almost surely, 2^404240791 is an apocalyptic number.

404240791 is a deficient number, since it is larger than the sum of its proper divisors (1724153).

404240791 is a wasteful number, since it uses less digits than its factorization.

404240791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 404240791 is about 20105.7402499883. The cubic root of 404240791 is about 739.4010194353.

The spelling of 404240791 in words is "four hundred four million, two hundred forty thousand, seven hundred ninety-one".