33280146 has 20 divisors (see below), whose sum is σ = 74572542. Its totient is φ = 11093328.

The previous prime is 33280133. The next prime is 33280171. The reversal of 33280146 is 64108233.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27154521 + 6125625 = 5211^2 + 2475^2 .

It is a super-2 number, since 2×33280146² = 2215136235562632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 102555 + ... + 102878.

Almost surely, 2^33280146 is an apocalyptic number.

33280146 is an abundant number, since it is smaller than the sum of its proper divisors (41292396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33280146 is a wasteful number, since it uses less digits than its factorization.

33280146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205447 (or 205438 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 33280146 is about 5768.8946948267. The cubic root of 33280146 is about 321.6585310598.

Adding to 33280146 its reverse (64108233), we get a palindrome (97388379).

The spelling of 33280146 in words is "thirty-three million, two hundred eighty thousand, one hundred forty-six".