42002004 has 36 divisors (see below), whose sum is σ = 107727872. Its totient is φ = 12727440.

The previous prime is 42001997. The next prime is 42002017. The reversal of 42002004 is 40020024.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 13012 + ... + 15915.

Almost surely, 2^42002004 is an apocalyptic number.

42002004 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42002004 is an abundant number, since it is smaller than the sum of its proper divisors (65725868).

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

42002004 is a wasteful number, since it uses less digits than its factorization.

42002004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28956 (or 28943 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 42002004 is about 6480.8953085203. The cubic root of 42002004 is about 347.6081929383.

Adding to 42002004 its reverse (40020024), we get a palindrome (82022028).

The spelling of 42002004 in words is "forty-two million, two thousand, four", and thus it is an eban number.