33220404 has 72 divisors (see below), whose sum is σ = 96544448. Its totient is φ = 9434880.

The previous prime is 33220393. The next prime is 33220423. The reversal of 33220404 is 40402233.

It is a super-2 number, since 2×33220404² = 2207190483846432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60459 + ... + 61005.

Almost surely, 2^33220404 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 33220404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48272224).

33220404 is an abundant number, since it is smaller than the sum of its proper divisors (63324044).

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

33220404 is a wasteful number, since it uses less digits than its factorization.

33220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 33220404 is about 5763.7144273463. The cubic root of 33220404 is about 321.4659434218.

Adding to 33220404 its reverse (40402233), we get a palindrome (73622637).

It can be divided in two parts, 332 and 20404, that added together give a 4-th power (20736 = 12⁴).

The spelling of 33220404 in words is "thirty-three million, two hundred twenty thousand, four hundred four".