42044840 has 32 divisors (see below), whose sum is σ = 94819680. Its totient is φ = 16779072.

The previous prime is 42044833. The next prime is 42044869. The reversal of 42044840 is 4844024.

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, 21587 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (2963115).

Almost surely, 2^42044840 is an apocalyptic number.

42044840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42044840 is an abundant number, since it is smaller than the sum of its proper divisors (52774840).

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

42044840 is a wasteful number, since it uses less digits than its factorization.

42044840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2437 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 42044840 is about 6484.1992566546. The cubic root of 42044840 is about 347.7263229009.

Adding to 42044840 its reverse (4844024), we get a palindrome (46888864).

The spelling of 42044840 in words is "forty-two million, forty-four thousand, eight hundred forty".