33297428 has 12 divisors (see below), whose sum is σ = 58836960. Its totient is φ = 16486872.

The previous prime is 33297421. The next prime is 33297457. The reversal of 33297428 is 82479233.

It is a happy number.

It is a super-2 number, since 2×33297428² = 2217437422830368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33297391 and 33297400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33297421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39998 + ... + 40821.

It is an arithmetic number, because the mean of its divisors is an integer number (4903080).

Almost surely, 2^33297428 is an apocalyptic number.

It is an amenable number.

33297428 is a deficient number, since it is larger than the sum of its proper divisors (25539532).

33297428 is a wasteful number, since it uses less digits than its factorization.

33297428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80926 (or 80924 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 33297428 is about 5770.3923610098. The cubic root of 33297428 is about 321.7141992930.

The spelling of 33297428 in words is "thirty-three million, two hundred ninety-seven thousand, four hundred twenty-eight".