42442784 has 24 divisors (see below), whose sum is σ = 84708540. Its totient is φ = 20929536.

The previous prime is 42442783. The next prime is 42442787. The reversal of 42442784 is 48724424.

It can be written as a sum of positive squares in 2 ways, for example, as 41319184 + 1123600 = 6428^2 + 1060^2 .

It is not an unprimeable number, because it can be changed into a prime (42442783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6749 + ... + 11420.

Almost surely, 2^42442784 is an apocalyptic number.

It is an amenable number.

42442784 is a deficient number, since it is larger than the sum of its proper divisors (42265756).

42442784 is a wasteful number, since it uses less digits than its factorization.

42442784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18252 (or 18244 counting only the distinct ones).

The product of its digits is 57344, while the sum is 35.

The square root of 42442784 is about 6514.8126603917. The cubic root of 42442784 is about 348.8199277395.

The spelling of 42442784 in words is "forty-two million, four hundred forty-two thousand, seven hundred eighty-four".