42905904 has 20 divisors (see below), whose sum is σ = 110840376. Its totient is φ = 14301952.

The previous prime is 42905899. The next prime is 42905917. The reversal of 42905904 is 40950924.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446889 + ... + 446984.

Almost surely, 2^42905904 is an apocalyptic number.

It is an amenable number.

42905904 is an abundant number, since it is smaller than the sum of its proper divisors (67934472).

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

42905904 is a wasteful number, since it uses less digits than its factorization.

42905904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893884 (or 893878 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 42905904 is about 6550.2598421742. The cubic root of 42905904 is about 350.0840723207.

The spelling of 42905904 in words is "forty-two million, nine hundred five thousand, nine hundred four".