33028156 has 60 divisors (see below), whose sum is σ = 71369480. Its totient is φ = 13335840.

The previous prime is 33028153. The next prime is 33028157. The reversal of 33028156 is 65182033.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33028153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 182386 + ... + 182566.

Almost surely, 2^33028156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33028156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35684740).

33028156 is an abundant number, since it is smaller than the sum of its proper divisors (38341324).

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

33028156 is a wasteful number, since it uses less digits than its factorization.

33028156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 33028156 is about 5747.0127892671. The cubic root of 33028156 is about 320.8446306398.

Subtracting from 33028156 its sum of digits (28), we obtain a triangular number (33028128 = T₈₁₂₇).

The spelling of 33028156 in words is "thirty-three million, twenty-eight thousand, one hundred fifty-six".