442775389 has 8 divisors (see below), whose sum is σ = 508652480. Its totient is φ = 377554176.

The previous prime is 442775371. The next prime is 442775419. The reversal of 442775389 is 983577244.

It is a happy number.

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 442775389 - 2⁵ = 442775357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442775339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162519 + ... + 165220.

It is an arithmetic number, because the mean of its divisors is an integer number (63581560).

Almost surely, 2^442775389 is an apocalyptic number.

It is an amenable number.

442775389 is a deficient number, since it is larger than the sum of its proper divisors (65877091).

442775389 is a wasteful number, since it uses less digits than its factorization.

442775389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327939.

The product of its digits is 1693440, while the sum is 49.

The square root of 442775389 is about 21042.2287080052. The cubic root of 442775389 is about 762.1863342671.

The spelling of 442775389 in words is "four hundred forty-two million, seven hundred seventy-five thousand, three hundred eighty-nine".