33028905 has 32 divisors (see below), whose sum is σ = 65044224. Its totient is φ = 13936896.

The previous prime is 33028871. The next prime is 33028927. The reversal of 33028905 is 50982033.

It is a happy number.

It is not a de Polignac number, because 33028905 - 2¹⁰ = 33027881 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10734 + ... + 13463.

It is an arithmetic number, because the mean of its divisors is an integer number (2032632).

Almost surely, 2^33028905 is an apocalyptic number.

33028905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

33028905 is a deficient number, since it is larger than the sum of its proper divisors (32015319).

33028905 is a wasteful number, since it uses less digits than its factorization.

33028905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24225.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 33028905 is about 5747.0779531863. The cubic root of 33028905 is about 320.8470559525.

It can be divided in two parts, 33028 and 905, that added together give a palindrome (33933).

The spelling of 33028905 in words is "thirty-three million, twenty-eight thousand, nine hundred five".