33222440 has 16 divisors (see below), whose sum is σ = 74750580. Its totient is φ = 13288960.

The previous prime is 33222433. The next prime is 33222443. The reversal of 33222440 is 4422233.

It can be written as a sum of positive squares in 2 ways, for example, as 29528356 + 3694084 = 5434^2 + 1922^2 .

It is a super-2 number, since 2×33222440² = 2207461039107200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (33222443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415241 + ... + 415320.

Almost surely, 2^33222440 is an apocalyptic number.

It is an amenable number.

33222440 is an abundant number, since it is smaller than the sum of its proper divisors (41528140).

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

33222440 is a wasteful number, since it uses less digits than its factorization.

33222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830572 (or 830568 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 33222440 is about 5763.8910468537. The cubic root of 33222440 is about 321.4725105835.

Adding to 33222440 its reverse (4422233), we get a palindrome (37644673).

The spelling of 33222440 in words is "thirty-three million, two hundred twenty-two thousand, four hundred forty".