42805884 has 48 divisors (see below), whose sum is σ = 109791360. Its totient is φ = 12872640.

The previous prime is 42805883. The next prime is 42805891. The reversal of 42805884 is 48850824.

42805884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42805883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17182 + ... + 19514.

It is an arithmetic number, because the mean of its divisors is an integer number (2287320).

Almost surely, 2^42805884 is an apocalyptic number.

42805884 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42805884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54895680).

42805884 is an abundant number, since it is smaller than the sum of its proper divisors (66985476).

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

42805884 is a wasteful number, since it uses less digits than its factorization.

42805884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490 (or 2488 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 42805884 is about 6542.6205758855. The cubic root of 42805884 is about 349.8118281022.

The spelling of 42805884 in words is "forty-two million, eight hundred five thousand, eight hundred eighty-four".