33428784 has 20 divisors (see below), whose sum is σ = 86357816. Its totient is φ = 11142912.

The previous prime is 33428777. The next prime is 33428789. The reversal of 33428784 is 48782433.

It is a super-2 number, since 2×33428784² = 2234967199437312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33428789) 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 3 ways as a sum of consecutive naturals, for example, 348169 + ... + 348264.

Almost surely, 2^33428784 is an apocalyptic number.

It is an amenable number.

33428784 is an abundant number, since it is smaller than the sum of its proper divisors (52929032).

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

33428784 is a wasteful number, since it uses less digits than its factorization.

33428784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696444 (or 696438 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 33428784 is about 5781.7630529104. The cubic root of 33428784 is about 322.1366908052.

The spelling of 33428784 in words is "thirty-three million, four hundred twenty-eight thousand, seven hundred eighty-four".