404452642 has 8 divisors (see below), whose sum is σ = 661831632. Its totient is φ = 183842100.

The previous prime is 404452619. The next prime is 404452649. The reversal of 404452642 is 246254404.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (404452649) 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 3 ways as a sum of consecutive naturals, for example, 9192084 + ... + 9192127.

It is an arithmetic number, because the mean of its divisors is an integer number (82728954).

Almost surely, 2^404452642 is an apocalyptic number.

404452642 is a deficient number, since it is larger than the sum of its proper divisors (257378990).

404452642 is a wasteful number, since it uses less digits than its factorization.

404452642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18384224.

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 404452642 is about 20111.0079807055. The cubic root of 404452642 is about 739.5301631642.

The spelling of 404452642 in words is "four hundred four million, four hundred fifty-two thousand, six hundred forty-two".