33989331 has 16 divisors (see below), whose sum is σ = 47494656. Its totient is φ = 21580416.

The previous prime is 33989321. The next prime is 33989353. The reversal of 33989331 is 13398933.

It is a happy number.

It is not a de Polignac number, because 33989331 - 2⁷ = 33989203 is a prime.

It is a super-2 number, since 2×33989331² = 2310549243655122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33989331.

It is not an unprimeable number, because it can be changed into a prime (33989321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17211 + ... + 19083.

It is an arithmetic number, because the mean of its divisors is an integer number (2968416).

Almost surely, 2^33989331 is an apocalyptic number.

33989331 is a deficient number, since it is larger than the sum of its proper divisors (13505325).

33989331 is a wasteful number, since it uses less digits than its factorization.

33989331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its digits is 52488, while the sum is 39.

The square root of 33989331 is about 5830.0369638622. The cubic root of 33989331 is about 323.9272908785.

The spelling of 33989331 in words is "thirty-three million, nine hundred eighty-nine thousand, three hundred thirty-one".