33428229 has 16 divisors (see below), whose sum is σ = 45344640. Its totient is φ = 21902400.

The previous prime is 33428189. The next prime is 33428251. The reversal of 33428229 is 92282433.

It is not a de Polignac number, because 33428229 - 2¹¹ = 33426181 is a prime.

It is a super-2 number, since 2×33428229² = 2234892988152882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33428229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33424229) 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 15 ways as a sum of consecutive naturals, for example, 49039 + ... + 49715.

It is an arithmetic number, because the mean of its divisors is an integer number (2834040).

Almost surely, 2^33428229 is an apocalyptic number.

It is an amenable number.

33428229 is a deficient number, since it is larger than the sum of its proper divisors (11916411).

33428229 is a wasteful number, since it uses less digits than its factorization.

33428229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940.

The product of its digits is 20736, while the sum is 33.

The square root of 33428229 is about 5781.7150569706. The cubic root of 33428229 is about 322.1349080416.

The spelling of 33428229 in words is "thirty-three million, four hundred twenty-eight thousand, two hundred twenty-nine".