40042224 has 30 divisors (see below), whose sum is σ = 112063016. Its totient is φ = 13347360.

The previous prime is 40042213. The next prime is 40042229. The reversal of 40042224 is 42224004.

40042224 is a `hidden beast` number, since 400 + 42 + 224 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40042197 and 40042206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138892 + ... + 139179.

Almost surely, 2^40042224 is an apocalyptic number.

It is an amenable number.

40042224 is an abundant number, since it is smaller than the sum of its proper divisors (72020792).

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

40042224 is a wasteful number, since it uses less digits than its factorization.

40042224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278085 (or 278076 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 40042224 is about 6327.8925401748. The cubic root of 40042224 is about 342.1154837250.

Adding to 40042224 its reverse (42224004), we get a palindrome (82266228).

It can be divided in two parts, 400 and 42224, that added together give a palindrome (42624).

The spelling of 40042224 in words is "forty million, forty-two thousand, two hundred twenty-four".