442806855388 has 6 divisors (see below), whose sum is σ = 774911996936. Its totient is φ = 221403427692.

The previous prime is 442806855367. The next prime is 442806855409. The reversal of 442806855388 is 883558608244.

It is an interprime number because it is at equal distance from previous prime (442806855367) and next prime (442806855409).

It is a super-2 number, since 2×442806855388² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55350856920 + ... + 55350856927.

Almost surely, 2^442806855388 is an apocalyptic number.

It is an amenable number.

442806855388 is a deficient number, since it is larger than the sum of its proper divisors (332105141548).

442806855388 is a wasteful number, since it uses less digits than its factorization.

442806855388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110701713851 (or 110701713849 counting only the distinct ones).

The product of its (nonzero) digits is 58982400, while the sum is 61.

The spelling of 442806855388 in words is "four hundred forty-two billion, eight hundred six million, eight hundred fifty-five thousand, three hundred eighty-eight".