33228782 has 4 divisors (see below), whose sum is σ = 49843176. Its totient is φ = 16614390.

The previous prime is 33228749. The next prime is 33228791. The reversal of 33228782 is 28782233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28782233 = 53 ⋅543061.

It is a super-2 number, since 2×33228782² = 2208303906407048, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 8307194 + ... + 8307197.

It is an arithmetic number, because the mean of its divisors is an integer number (12460794).

Almost surely, 2^33228782 is an apocalyptic number.

33228782 is a deficient number, since it is larger than the sum of its proper divisors (16614394).

33228782 is a wasteful number, since it uses less digits than its factorization.

33228782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16614393.

The product of its digits is 32256, while the sum is 35.

The square root of 33228782 is about 5764.4411697926. The cubic root of 33228782 is about 321.4929651211.

The spelling of 33228782 in words is "thirty-three million, two hundred twenty-eight thousand, seven hundred eighty-two".