33420442 has 12 divisors (see below), whose sum is σ = 55102698. Its totient is φ = 15191000.

The previous prime is 33420407. The next prime is 33420451. The reversal of 33420442 is 24402433.

It can be written as a sum of positive squares in only one way, i.e., 32844361 + 576081 = 5731^2 + 759^2 .

It is a super-2 number, since 2×33420442² = 2233851886950728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 68809 + ... + 69292.

Almost surely, 2^33420442 is an apocalyptic number.

33420442 is a deficient number, since it is larger than the sum of its proper divisors (21682256).

33420442 is a wasteful number, since it uses less digits than its factorization.

33420442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138125 (or 138114 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 33420442 is about 5781.0416016493. The cubic root of 33420442 is about 322.1098926638.

Adding to 33420442 its reverse (24402433), we get a palindrome (57822875).

Subtracting from 33420442 its reverse (24402433), we obtain a square (9018009 = 3003²).

The spelling of 33420442 in words is "thirty-three million, four hundred twenty thousand, four hundred forty-two".