442765426 has 4 divisors (see below), whose sum is σ = 664148142. Its totient is φ = 221382712.

The previous prime is 442765423. The next prime is 442765451. The reversal of 442765426 is 624567244.

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., 434931025 + 7834401 = 20855^2 + 2799^2 .

It is a super-2 number, since 2×442765426² = 392082444921922952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442765423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110691355 + ... + 110691358.

Almost surely, 2^442765426 is an apocalyptic number.

442765426 is a deficient number, since it is larger than the sum of its proper divisors (221382716).

442765426 is a wasteful number, since it uses less digits than its factorization.

442765426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221382715.

The product of its digits is 322560, while the sum is 40.

The square root of 442765426 is about 21041.9919684425. The cubic root of 442765426 is about 762.1806175090.

The spelling of 442765426 in words is "four hundred forty-two million, seven hundred sixty-five thousand, four hundred twenty-six".