404691842 has 8 divisors (see below), whose sum is σ = 608840076. Its totient is φ = 201745152.

The previous prime is 404691827. The next prime is 404691863. The reversal of 404691842 is 248196404.

It can be written as a sum of positive squares in 2 ways, for example, as 396846241 + 7845601 = 19921^2 + 2801^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 404691796 and 404691805.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 299543 + ... + 300890.

Almost surely, 2^404691842 is an apocalyptic number.

404691842 is a deficient number, since it is larger than the sum of its proper divisors (204148234).

404691842 is a wasteful number, since it uses less digits than its factorization.

404691842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600772.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 404691842 is about 20116.9540935003. The cubic root of 404691842 is about 739.6759245671.

The spelling of 404691842 in words is "four hundred four million, six hundred ninety-one thousand, eight hundred forty-two".