42249444 has 12 divisors (see below), whose sum is σ = 98582064. Its totient is φ = 14083144.

The previous prime is 42249419. The next prime is 42249461. The reversal of 42249444 is 44494224.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760382 + ... + 1760405.

It is an arithmetic number, because the mean of its divisors is an integer number (8215172).

Almost surely, 2^42249444 is an apocalyptic number.

It is an amenable number.

42249444 is an abundant number, since it is smaller than the sum of its proper divisors (56332620).

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

42249444 is a wasteful number, since it uses less digits than its factorization.

42249444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520794 (or 3520792 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

The square root of 42249444 is about 6499.9572306285. The cubic root of 42249444 is about 348.2894605784.

The spelling of 42249444 in words is "forty-two million, two hundred forty-nine thousand, four hundred forty-four".