42445404 has 24 divisors (see below), whose sum is σ = 110043920. Its totient is φ = 14148432.

The previous prime is 42445397. The next prime is 42445409. The reversal of 42445404 is 40454424.

It is a happy number.

42445404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42445404² = 3603224641446432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42445409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196399 + ... + 196614.

Almost surely, 2^42445404 is an apocalyptic number.

It is an amenable number.

42445404 is an abundant number, since it is smaller than the sum of its proper divisors (67598516).

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

42445404 is a wasteful number, since it uses less digits than its factorization.

42445404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393026 (or 393018 counting only the distinct ones).

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

The square root of 42445404 is about 6515.0137375143. The cubic root of 42445404 is about 348.8271051622.

Adding to 42445404 its reverse (40454424), we get a palindrome (82899828).

It can be divided in two parts, 42445 and 404, that added together give a square (42849 = 207²).

The spelling of 42445404 in words is "forty-two million, four hundred forty-five thousand, four hundred four".