42544404 has 72 divisors (see below), whose sum is σ = 130148928. Its totient is φ = 11439360.

The previous prime is 42544393. The next prime is 42544451. The reversal of 42544404 is 40444524.

It is a happy number.

42544404 is a `hidden beast` number, since 4 + 254 + 4 + 404 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 682 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (1807624).

Almost surely, 2^42544404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42544404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65074464).

42544404 is an abundant number, since it is smaller than the sum of its proper divisors (87604524).

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

42544404 is a wasteful number, since it uses less digits than its factorization.

42544404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9965 (or 9960 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 42544404 is about 6522.6071474526. The cubic root of 42544404 is about 349.0980969608.

Adding to 42544404 its reverse (40444524), we get a palindrome (82988928).

It can be divided in two parts, 42 and 544404, that added together give a triangular number (544446 = T₁₀₄₃).

The spelling of 42544404 in words is "forty-two million, five hundred forty-four thousand, four hundred four".