42805885 has 32 divisors (see below), whose sum is σ = 55987200. Its totient is φ = 31342080.

The previous prime is 42805883. The next prime is 42805891. The reversal of 42805885 is 58850824.

It is a happy number.

It is not a de Polignac number, because 42805885 - 2¹ = 42805883 is a prime.

42805885 is a modest number, since divided by 5885 gives 4280 as remainder.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400002 + ... + 400108.

It is an arithmetic number, because the mean of its divisors is an integer number (1749600).

Almost surely, 2^42805885 is an apocalyptic number.

It is an amenable number.

42805885 is a deficient number, since it is larger than the sum of its proper divisors (13181315).

42805885 is a wasteful number, since it uses less digits than its factorization.

42805885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 42805885 is about 6542.6206523075. The cubic root of 42805885 is about 349.8118308262.

The spelling of 42805885 in words is "forty-two million, eight hundred five thousand, eight hundred eighty-five".