42244240 has 20 divisors (see below), whose sum is σ = 98218044. Its totient is φ = 16897664.

The previous prime is 42244231. The next prime is 42244247. The reversal of 42244240 is 4244224.

It can be written as a sum of positive squares in 2 ways, for example, as 10163344 + 32080896 = 3188^2 + 5664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (42244247) 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, 263947 + ... + 264106.

Almost surely, 2^42244240 is an apocalyptic number.

42244240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42244240 is an abundant number, since it is smaller than the sum of its proper divisors (55973804).

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

42244240 is a wasteful number, since it uses less digits than its factorization.

42244240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528066 (or 528060 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 42244240 is about 6499.5569079746. The cubic root of 42244240 is about 348.2751600133.

Adding to 42244240 its reverse (4244224), we get a palindrome (46488464).

It can be divided in two parts, 4224 and 4240, that added together give a square (8464 = 92²).

The spelling of 42244240 in words is "forty-two million, two hundred forty-four thousand, two hundred forty".