33440005 has 4 divisors (see below), whose sum is σ = 40128012. Its totient is φ = 26752000.

The previous prime is 33439993. The next prime is 33440009. The reversal of 33440005 is 50004433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50004433 = 701 ⋅71333.

It can be written as a sum of positive squares in 2 ways, for example, as 25948836 + 7491169 = 5094^2 + 2737^2 .

It is not a de Polignac number, because 33440005 - 2¹³ = 33431813 is a prime.

It is a super-2 number, since 2×33440005² = 2236467868800050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33440009) 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, 3343996 + ... + 3344005.

It is an arithmetic number, because the mean of its divisors is an integer number (10032003).

Almost surely, 2^33440005 is an apocalyptic number.

It is an amenable number.

33440005 is a deficient number, since it is larger than the sum of its proper divisors (6688007).

33440005 is an equidigital number, since it uses as much as digits as its factorization.

33440005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6688006.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 33440005 is about 5782.7333502419. The cubic root of 33440005 is about 322.1727305191.

Adding to 33440005 its reverse (50004433), we get a palindrome (83444438).

The spelling of 33440005 in words is "thirty-three million, four hundred forty thousand, five".