42422004 has 36 divisors (see below), whose sum is σ = 113542884. Its totient is φ = 13308672.

The previous prime is 42421991. The next prime is 42422011. The reversal of 42422004 is 40022424.

It can be written as a sum of positive squares in 2 ways, for example, as 26501904 + 15920100 = 5148^2 + 3990^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34047 + ... + 35270.

It is an arithmetic number, because the mean of its divisors is an integer number (3153969).

Almost surely, 2^42422004 is an apocalyptic number.

It is an amenable number.

42422004 is an abundant number, since it is smaller than the sum of its proper divisors (71120880).

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

42422004 is a wasteful number, since it uses less digits than its factorization.

42422004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69344 (or 69339 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42422004 is about 6513.2176380035. The cubic root of 42422004 is about 348.7629909987.

Adding to 42422004 its reverse (40022424), we get a palindrome (82444428).

The spelling of 42422004 in words is "forty-two million, four hundred twenty-two thousand, four".