33228865 has 8 divisors (see below), whose sum is σ = 39976488. Its totient is φ = 26515200.

The previous prime is 33228857. The next prime is 33228883. The reversal of 33228865 is 56882233.

It can be written as a sum of positive squares in 4 ways, for example, as 15689521 + 17539344 = 3961^2 + 4188^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33228865 - 2³ = 33228857 is a prime.

It is a super-2 number, since 2×33228865² = 2208314938376450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6282 + ... + 10291.

It is an arithmetic number, because the mean of its divisors is an integer number (4997061).

Almost surely, 2^33228865 is an apocalyptic number.

It is an amenable number.

33228865 is a deficient number, since it is larger than the sum of its proper divisors (6747623).

33228865 is a wasteful number, since it uses less digits than its factorization.

33228865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16979.

The product of its digits is 69120, while the sum is 37.

The square root of 33228865 is about 5764.4483690983. The cubic root of 33228865 is about 321.4932327996.

The spelling of 33228865 in words is "thirty-three million, two hundred twenty-eight thousand, eight hundred sixty-five".