42843820 has 24 divisors (see below), whose sum is σ = 91317744. Its totient is φ = 16881216.

The previous prime is 42843809. The next prime is 42843847. The reversal of 42843820 is 2834824.

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, 14647 + ... + 17326.

It is an arithmetic number, because the mean of its divisors is an integer number (3804906).

Almost surely, 2^42843820 is an apocalyptic number.

It is an amenable number.

42843820 is an abundant number, since it is smaller than the sum of its proper divisors (48473924).

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

42843820 is a wasteful number, since it uses less digits than its factorization.

42843820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32049 (or 32047 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 42843820 is about 6545.5190779647. The cubic root of 42843820 is about 349.9151358873.

The spelling of 42843820 in words is "forty-two million, eight hundred forty-three thousand, eight hundred twenty".