33214428 has 96 divisors (see below), whose sum is σ = 95161920. Its totient is φ = 9953280.

The previous prime is 33214427. The next prime is 33214453. The reversal of 33214428 is 82441233.

It is a super-2 number, since 2×33214428² = 2206396454734368, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33214421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57276 + ... + 57852.

It is an arithmetic number, because the mean of its divisors is an integer number (991270).

Almost surely, 2^33214428 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 33214428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47580960).

33214428 is an abundant number, since it is smaller than the sum of its proper divisors (61947492).

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

33214428 is a wasteful number, since it uses less digits than its factorization.

33214428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 636 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 33214428 is about 5763.1959883384. The cubic root of 33214428 is about 321.4466661559.

The spelling of 33214428 in words is "thirty-three million, two hundred fourteen thousand, four hundred twenty-eight".