33090816 has 72 divisors (see below), whose sum is σ = 96100704. Its totient is φ = 10024960.

The previous prime is 33090803. The next prime is 33090821. The reversal of 33090816 is 61809033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6490 + ... + 10406.

It is an arithmetic number, because the mean of its divisors is an integer number (1334732).

Almost surely, 2^33090816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33090816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48050352).

33090816 is an abundant number, since it is smaller than the sum of its proper divisors (63009888).

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

33090816 is a wasteful number, since it uses less digits than its factorization.

33090816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947 (or 3933 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 33090816 is about 5752.4617339014. The cubic root of 33090816 is about 321.0474013132.

Adding to 33090816 its reverse (61809033), we get a palindrome (94899849).

The spelling of 33090816 in words is "thirty-three million, ninety thousand, eight hundred sixteen".