442904746 has 4 divisors (see below), whose sum is σ = 664357122. Its totient is φ = 221452372.

The previous prime is 442904701. The next prime is 442904747. The reversal of 442904746 is 647409244.

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

It can be written as a sum of positive squares in only one way, i.e., 442639521 + 265225 = 21039^2 + 515^2 .

It is a super-2 number, since 2×442904746² = 392329228058649032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442904699 and 442904708.

It is not an unprimeable number, because it can be changed into a prime (442904747) 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 as a sum of consecutive naturals, namely, 110726185 + ... + 110726188.

Almost surely, 2^442904746 is an apocalyptic number.

442904746 is a deficient number, since it is larger than the sum of its proper divisors (221452376).

442904746 is a wasteful number, since it uses less digits than its factorization.

442904746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221452375.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 442904746 is about 21045.3022311394. The cubic root of 442904746 is about 762.2605513835.

The spelling of 442904746 in words is "four hundred forty-two million, nine hundred four thousand, seven hundred forty-six".