442780172 has 12 divisors (see below), whose sum is σ = 776891136. Its totient is φ = 220811280.

The previous prime is 442780111. The next prime is 442780193. The reversal of 442780172 is 271087244.

It is a happy number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 142979 + ... + 146042.

It is an arithmetic number, because the mean of its divisors is an integer number (64740928).

Almost surely, 2^442780172 is an apocalyptic number.

It is an amenable number.

442780172 is a deficient number, since it is larger than the sum of its proper divisors (334110964).

442780172 is a wasteful number, since it uses less digits than its factorization.

442780172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289408 (or 289406 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 442780172 is about 21042.3423601081. The cubic root of 442780172 is about 762.1890787166.

The spelling of 442780172 in words is "four hundred forty-two million, seven hundred eighty thousand, one hundred seventy-two".