42005904 has 40 divisors (see below), whose sum is σ = 108763872. Its totient is φ = 13969920.

The previous prime is 42005897. The next prime is 42005917. The reversal of 42005904 is 40950024.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 30184 + ... + 31544.

Almost surely, 2^42005904 is an apocalyptic number.

It is an amenable number.

42005904 is an abundant number, since it is smaller than the sum of its proper divisors (66757968).

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

42005904 is a wasteful number, since it uses less digits than its factorization.

42005904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 42005904 is about 6481.1961858904. The cubic root of 42005904 is about 347.6189513932.

Adding to 42005904 its reverse (40950024), we get a palindrome (82955928).

The spelling of 42005904 in words is "forty-two million, five thousand, nine hundred four".