42002444 has 48 divisors (see below), whose sum is σ = 85621536. Its totient is φ = 17817600.

The previous prime is 42002431. The next prime is 42002449. The reversal of 42002444 is 44420024.

It is not an unprimeable number, because it can be changed into a prime (42002449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174164 + ... + 174404.

It is an arithmetic number, because the mean of its divisors is an integer number (1783782).

Almost surely, 2^42002444 is an apocalyptic number.

42002444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42002444 is an abundant number, since it is smaller than the sum of its proper divisors (43619092).

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

42002444 is a wasteful number, since it uses less digits than its factorization.

42002444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 42002444 is about 6480.9292543585. The cubic root of 42002444 is about 347.6094067461.

Adding to 42002444 its reverse (44420024), we get a palindrome (86422468).

The spelling of 42002444 in words is "forty-two million, two thousand, four hundred forty-four".