33281968 has 20 divisors (see below), whose sum is σ = 64817280. Its totient is φ = 16554944.

The previous prime is 33281947. The next prime is 33281987. The reversal of 33281968 is 86918233.

It is a super-2 number, since 2×33281968² = 2215378787906048, 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 33281968.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128 + ... + 8431.

It is an arithmetic number, because the mean of its divisors is an integer number (3240864).

Almost surely, 2^33281968 is an apocalyptic number.

It is an amenable number.

33281968 is a deficient number, since it is larger than the sum of its proper divisors (31535312).

33281968 is a wasteful number, since it uses less digits than its factorization.

33281968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10764 (or 10758 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 33281968 is about 5769.0526085311. The cubic root of 33281968 is about 321.6644009374.

The spelling of 33281968 in words is "thirty-three million, two hundred eighty-one thousand, nine hundred sixty-eight".