33424240 has 40 divisors (see below), whose sum is σ = 80396640. Its totient is φ = 12907776.

The previous prime is 33424229. The next prime is 33424243. The reversal of 33424240 is 4242433.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×33424240² = 2234359639155200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33424243) 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 7 ways as a sum of consecutive naturals, for example, 4884 + ... + 9523.

It is an arithmetic number, because the mean of its divisors is an integer number (2009916).

Almost surely, 2^33424240 is an apocalyptic number.

It is an amenable number.

33424240 is an abundant number, since it is smaller than the sum of its proper divisors (46972400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33424240 is a wasteful number, since it uses less digits than its factorization.

33424240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14449 (or 14443 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 33424240 is about 5781.3700798340. The cubic root of 33424240 is about 322.1220940488.

Adding to 33424240 its reverse (4242433), we get a palindrome (37666673).

It can be divided in two parts, 3 and 3424240, that added together give a palindrome (3424243).

The spelling of 33424240 in words is "thirty-three million, four hundred twenty-four thousand, two hundred forty".