442543820 has 24 divisors (see below), whose sum is σ = 978255600. Its totient is φ = 167700672.

The previous prime is 442543793. The next prime is 442543853. The reversal of 442543820 is 28345244.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581915 + ... + 582674.

It is an arithmetic number, because the mean of its divisors is an integer number (40760650).

Almost surely, 2^442543820 is an apocalyptic number.

It is an amenable number.

442543820 is an abundant number, since it is smaller than the sum of its proper divisors (535711780).

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

442543820 is a wasteful number, since it uses less digits than its factorization.

442543820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164617 (or 1164615 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 442543820 is about 21036.7255056484. The cubic root of 442543820 is about 762.0534380630.

The spelling of 442543820 in words is "four hundred forty-two million, five hundred forty-three thousand, eight hundred twenty".