40042413 has 12 divisors (see below), whose sum is σ = 58788028. Its totient is φ = 26256960.

The previous prime is 40042411. The next prime is 40042423. The reversal of 40042413 is 31424004.

It can be written as a sum of positive squares in 2 ways, for example, as 20088324 + 19954089 = 4482^2 + 4467^2 .

It is not a de Polignac number, because 40042413 - 2¹ = 40042411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35920 + ... + 37017.

Almost surely, 2^40042413 is an apocalyptic number.

It is an amenable number.

40042413 is a deficient number, since it is larger than the sum of its proper divisors (18745615).

40042413 is a wasteful number, since it uses less digits than its factorization.

40042413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73004 (or 73001 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40042413 is about 6327.9074740391. The cubic root of 40042413 is about 342.1160219878.

Adding to 40042413 its reverse (31424004), we get a palindrome (71466417).

The spelling of 40042413 in words is "forty million, forty-two thousand, four hundred thirteen".