33920889 has 12 divisors (see below), whose sum is σ = 45894288. Its totient is φ = 22285480.

The previous prime is 33920881. The next prime is 33920891. The reversal of 33920889 is 98802933.

33920889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 33920889 - 2³ = 33920881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33920889.

It is not an unprimeable number, because it can be changed into a prime (33920881) 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 11 ways as a sum of consecutive naturals, for example, 14002 + ... + 16244.

It is an arithmetic number, because the mean of its divisors is an integer number (3824524).

Almost surely, 2^33920889 is an apocalyptic number.

It is an amenable number.

33920889 is a deficient number, since it is larger than the sum of its proper divisors (11973399).

33920889 is an equidigital number, since it uses as much as digits as its factorization.

33920889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 33920889 is about 5824.1642318877. The cubic root of 33920889 is about 323.7097213398.

The spelling of 33920889 in words is "thirty-three million, nine hundred twenty thousand, eight hundred eighty-nine".