33280528 has 20 divisors (see below), whose sum is σ = 64577340. Its totient is φ = 16615424.

The previous prime is 33280519. The next prime is 33280537. The reversal of 33280528 is 82508233.

It is an interprime number because it is at equal distance from previous prime (33280519) and next prime (33280537).

It can be written as a sum of positive squares in 2 ways, for example, as 21086464 + 12194064 = 4592^2 + 3492^2 .

It is a super-2 number, since 2×33280528² = 2215187087917568, 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 33280528.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14568 + ... + 16696.

It is an arithmetic number, because the mean of its divisors is an integer number (3228867).

Almost surely, 2^33280528 is an apocalyptic number.

It is an amenable number.

33280528 is a deficient number, since it is larger than the sum of its proper divisors (31296812).

33280528 is a wasteful number, since it uses less digits than its factorization.

33280528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 33280528 is about 5768.9278033271. The cubic root of 33280528 is about 321.6597617544.

The spelling of 33280528 in words is "thirty-three million, two hundred eighty thousand, five hundred twenty-eight".