42805490 has 64 divisors (see below), whose sum is σ = 100445184. Its totient is φ = 12745728.

The previous prime is 42805487. The next prime is 42805561. The reversal of 42805490 is 9450824.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14087 + ... + 16853.

It is an arithmetic number, because the mean of its divisors is an integer number (1569456).

Almost surely, 2^42805490 is an apocalyptic number.

42805490 is an abundant number, since it is smaller than the sum of its proper divisors (57639694).

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

42805490 is a wasteful number, since it uses less digits than its factorization.

42805490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 42805490 is about 6542.5904655572. The cubic root of 42805490 is about 349.8107548364.

The spelling of 42805490 in words is "forty-two million, eight hundred five thousand, four hundred ninety".