33440145 has 16 divisors (see below), whose sum is σ = 53786112. Its totient is φ = 17740800.

The previous prime is 33440123. The next prime is 33440149. The reversal of 33440145 is 54104433.

It is not a de Polignac number, because 33440145 - 2⁶ = 33440081 is a prime.

It is a super-2 number, since 2×33440145² = 2236486595242050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33440149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2881 + ... + 8670.

It is an arithmetic number, because the mean of its divisors is an integer number (3361632).

Almost surely, 2^33440145 is an apocalyptic number.

It is an amenable number.

33440145 is a deficient number, since it is larger than the sum of its proper divisors (20345967).

33440145 is a wasteful number, since it uses less digits than its factorization.

33440145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11752.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 33440145 is about 5782.7454552315. The cubic root of 33440145 is about 322.1731801215.

Adding to 33440145 its reverse (54104433), we get a palindrome (87544578).

The spelling of 33440145 in words is "thirty-three million, four hundred forty thousand, one hundred forty-five".