33040904 has 16 divisors (see below), whose sum is σ = 66717420. Its totient is φ = 15249600.

The previous prime is 33040901. The next prime is 33040913. The reversal of 33040904 is 40904033.

It can be written as a sum of positive squares in 2 ways, for example, as 28622500 + 4418404 = 5350^2 + 2102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 33040904.

It is not an unprimeable number, because it can be changed into a prime (33040901) 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, 158747 + ... + 158954.

Almost surely, 2^33040904 is an apocalyptic number.

It is an amenable number.

33040904 is an abundant number, since it is smaller than the sum of its proper divisors (33676516).

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

33040904 is a wasteful number, since it uses less digits than its factorization.

33040904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317720 (or 317716 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 33040904 is about 5748.1217801992. The cubic root of 33040904 is about 320.8859045279.

Adding to 33040904 its reverse (40904033), we get a palindrome (73944937).

The spelling of 33040904 in words is "thirty-three million, forty thousand, nine hundred four".