33333138 has 12 divisors (see below), whose sum is σ = 72221838. Its totient is φ = 11111040.

The previous prime is 33333137. The next prime is 33333143. The reversal of 33333138 is 83133333.

It can be written as a sum of positive squares in only one way, i.e., 26347689 + 6985449 = 5133^2 + 2643^2 .

It is a super-2 number, since 2×33333138² = 2222196177854088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33333133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 925903 + ... + 925938.

Almost surely, 2^33333138 is an apocalyptic number.

33333138 is an abundant number, since it is smaller than the sum of its proper divisors (38888700).

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

33333138 is a wasteful number, since it uses less digits than its factorization.

33333138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851849 (or 1851846 counting only the distinct ones).

The product of its digits is 5832, while the sum is 27.

The square root of 33333138 is about 5773.4857755086. The cubic root of 33333138 is about 321.8291662264.

It can be divided in two parts, 33333 and 138, that multiplied together give a palindrome (4599954).

The spelling of 33333138 in words is "thirty-three million, three hundred thirty-three thousand, one hundred thirty-eight".