33507028 has 12 divisors (see below), whose sum is σ = 58850932. Its totient is φ = 16692480.

The previous prime is 33506947. The next prime is 33507029. The reversal of 33507028 is 82070533.

It can be written as a sum of positive squares in 2 ways, for example, as 5438224 + 28068804 = 2332^2 + 5298^2 .

It is a super-2 number, since 2×33507028² = 2245441850785568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 33506987 and 33507005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33507029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14013 + ... + 16228.

Almost surely, 2^33507028 is an apocalyptic number.

It is an amenable number.

33507028 is a deficient number, since it is larger than the sum of its proper divisors (25343904).

33507028 is a wasteful number, since it uses less digits than its factorization.

33507028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30522 (or 30520 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 33507028 is about 5788.5255462855. The cubic root of 33507028 is about 322.3878279038.

The spelling of 33507028 in words is "thirty-three million, five hundred seven thousand, twenty-eight".