40042433 has 4 divisors (see below), whose sum is σ = 40098240. Its totient is φ = 39986628.

The previous prime is 40042427. The next prime is 40042441. The reversal of 40042433 is 33424004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40042433 - 2⁶ = 40042369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40042423) 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, 26813 + ... + 28266.

It is an arithmetic number, because the mean of its divisors is an integer number (10024560).

Almost surely, 2^40042433 is an apocalyptic number.

It is an amenable number.

40042433 is a deficient number, since it is larger than the sum of its proper divisors (55807).

40042433 is an equidigital number, since it uses as much as digits as its factorization.

40042433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55806.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40042433 is about 6327.9090543401. The cubic root of 40042433 is about 342.1160789467.

Adding to 40042433 its reverse (33424004), we get a palindrome (73466437).

The spelling of 40042433 in words is "forty million, forty-two thousand, four hundred thirty-three".