42207444 has 18 divisors (see below), whose sum is σ = 106691130. Its totient is φ = 14069136.

The previous prime is 42207427. The next prime is 42207497. The reversal of 42207444 is 44470224.

It can be written as a sum of positive squares in only one way, i.e., 29030544 + 13176900 = 5388^2 + 3630^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586179 + ... + 586250.

It is an arithmetic number, because the mean of its divisors is an integer number (5927285).

Almost surely, 2^42207444 is an apocalyptic number.

It is an amenable number.

42207444 is an abundant number, since it is smaller than the sum of its proper divisors (64483686).

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

42207444 is a wasteful number, since it uses less digits than its factorization.

42207444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172439 (or 1172434 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 27.

The square root of 42207444 is about 6496.7256368112. The cubic root of 42207444 is about 348.1740112699.

Adding to 42207444 its reverse (44470224), we get a palindrome (86677668).

It can be divided in two parts, 4220 and 7444, that added together give a square (11664 = 108²).

The spelling of 42207444 in words is "forty-two million, two hundred seven thousand, four hundred forty-four".