40013224 has 8 divisors (see below), whose sum is σ = 75024810. Its totient is φ = 20006608.

The previous prime is 40013201. The next prime is 40013227. The reversal of 40013224 is 42231004.

It can be written as a sum of positive squares in only one way, i.e., 39917124 + 96100 = 6318^2 + 310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 40013198 and 40013207.

It is not an unprimeable number, because it can be changed into a prime (40013227) by changing a digit.

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 as a sum of consecutive naturals, namely, 2500819 + ... + 2500834.

Almost surely, 2^40013224 is an apocalyptic number.

It is an amenable number.

40013224 is a deficient number, since it is larger than the sum of its proper divisors (35011586).

40013224 is a wasteful number, since it uses less digits than its factorization.

40013224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001659 (or 5001655 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40013224 is about 6325.6006829391. The cubic root of 40013224 is about 342.0328730528.

Adding to 40013224 its reverse (42231004), we get a palindrome (82244228).

It can be divided in two parts, 4001 and 3224, that added together give a square (7225 = 85²).

The spelling of 40013224 in words is "forty million, thirteen thousand, two hundred twenty-four".