33243138 has 24 divisors (see below), whose sum is σ = 72133308. Its totient is φ = 11064672.

The previous prime is 33243097. The next prime is 33243157. The reversal of 33243138 is 83134233.

It can be written as a sum of positive squares in 2 ways, for example, as 29452329 + 3790809 = 5427^2 + 1947^2 .

It is a super-2 number, since 2×33243138² = 2210212448174088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21520 + ... + 23012.

Almost surely, 2^33243138 is an apocalyptic number.

33243138 is an abundant number, since it is smaller than the sum of its proper divisors (38890170).

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

33243138 is a wasteful number, since it uses less digits than its factorization.

33243138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738 (or 2735 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 33243138 is about 5765.6862557722. The cubic root of 33243138 is about 321.5392572031.

The spelling of 33243138 in words is "thirty-three million, two hundred forty-three thousand, one hundred thirty-eight".