42090044 has 6 divisors (see below), whose sum is σ = 73657584. Its totient is φ = 21045020.

The previous prime is 42090043. The next prime is 42090071. The reversal of 42090044 is 44009024.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42090043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5261252 + ... + 5261259.

It is an arithmetic number, because the mean of its divisors is an integer number (12276264).

Almost surely, 2^42090044 is an apocalyptic number.

It is an amenable number.

42090044 is a deficient number, since it is larger than the sum of its proper divisors (31567540).

42090044 is a wasteful number, since it uses less digits than its factorization.

42090044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522515 (or 10522513 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 42090044 is about 6487.6840243649. The cubic root of 42090044 is about 347.8508961806.

Adding to 42090044 its reverse (44009024), we get a palindrome (86099068).

The spelling of 42090044 in words is "forty-two million, ninety thousand, forty-four".