33404216 has 32 divisors (see below), whose sum is σ = 64895040. Its totient is φ = 16109568.

The previous prime is 33404213. The next prime is 33404221. The reversal of 33404216 is 61240433.

It is a happy number.

It is a super-2 number, since 2×33404216² = 2231683293149312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33404191 and 33404200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33404213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26840 + ... + 28056.

It is an arithmetic number, because the mean of its divisors is an integer number (2027970).

Almost surely, 2^33404216 is an apocalyptic number.

It is an amenable number.

33404216 is a deficient number, since it is larger than the sum of its proper divisors (31490824).

33404216 is a wasteful number, since it uses less digits than its factorization.

33404216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 33404216 is about 5779.6380509509. The cubic root of 33404216 is about 322.0577549014.

Adding to 33404216 its reverse (61240433), we get a palindrome (94644649).

The spelling of 33404216 in words is "thirty-three million, four hundred four thousand, two hundred sixteen".