442206140 has 12 divisors (see below), whose sum is σ = 928632936. Its totient is φ = 176882448.

The previous prime is 442206077. The next prime is 442206169. The reversal of 442206140 is 41602244.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11055134 + ... + 11055173.

It is an arithmetic number, because the mean of its divisors is an integer number (77386078).

Almost surely, 2^442206140 is an apocalyptic number.

It is an amenable number.

442206140 is an abundant number, since it is smaller than the sum of its proper divisors (486426796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442206140 is a wasteful number, since it uses less digits than its factorization.

442206140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22110316 (or 22110314 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 442206140 is about 21028.6980101004. The cubic root of 442206140 is about 761.8595622082.

Adding to 442206140 its reverse (41602244), we get a palindrome (483808384).

The spelling of 442206140 in words is "four hundred forty-two million, two hundred six thousand, one hundred forty".