33722816 has 28 divisors (see below), whose sum is σ = 67525392. Its totient is φ = 16708608.

The previous prime is 33722803. The next prime is 33722827. The reversal of 33722816 is 61822733.

It is a happy number.

It is a super-2 number, since 2×33722816² = 2274456637939712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4901 + ... + 9563.

Almost surely, 2^33722816 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 33722816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33762696).

33722816 is an abundant number, since it is smaller than the sum of its proper divisors (33802576).

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

33722816 is a wasteful number, since it uses less digits than its factorization.

33722816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788 (or 4778 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 33722816 is about 5807.1349218009. The cubic root of 33722816 is about 323.0784155289.

The spelling of 33722816 in words is "thirty-three million, seven hundred twenty-two thousand, eight hundred sixteen".