33720328 has 8 divisors (see below), whose sum is σ = 63225630. Its totient is φ = 16860160.

The previous prime is 33720287. The next prime is 33720331. The reversal of 33720328 is 82302733.

It can be written as a sum of positive squares in only one way, i.e., 32285124 + 1435204 = 5682^2 + 1198^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×33720328² = 2274121040855168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33720296 and 33720305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2107513 + ... + 2107528.

Almost surely, 2^33720328 is an apocalyptic number.

It is an amenable number.

33720328 is a deficient number, since it is larger than the sum of its proper divisors (29505302).

33720328 is a wasteful number, since it uses less digits than its factorization.

33720328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215047 (or 4215043 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 33720328 is about 5806.9206986147. The cubic root of 33720328 is about 323.0704699798.

The spelling of 33720328 in words is "thirty-three million, seven hundred twenty thousand, three hundred twenty-eight".