33280005 has 32 divisors (see below), whose sum is σ = 58693248. Its totient is φ = 15968000.

The previous prime is 33279997. The next prime is 33280007. The reversal of 33280005 is 50008233.

It is not a de Polignac number, because 33280005 - 2³ = 33279997 is a prime.

It is a super-2 number, since 2×33280005² = 2215117465600050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33280007) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 15667 + ... + 17663.

It is an arithmetic number, because the mean of its divisors is an integer number (1834164).

Almost surely, 2^33280005 is an apocalyptic number.

It is an amenable number.

33280005 is a deficient number, since it is larger than the sum of its proper divisors (25413243).

33280005 is a wasteful number, since it uses less digits than its factorization.

33280005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 33280005 is about 5768.8824741019. The cubic root of 33280005 is about 321.6580767958.

Adding to 33280005 its reverse (50008233), we get a palindrome (83288238).

The spelling of 33280005 in words is "thirty-three million, two hundred eighty thousand, five".