33138385 has 16 divisors (see below), whose sum is σ = 45706752. Its totient is φ = 22593600.

The previous prime is 33138319. The next prime is 33138397. The reversal of 33138385 is 58383133.

It is a happy number.

It is not a de Polignac number, because 33138385 - 2⁷ = 33138257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33138385.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3720 + ... + 8950.

It is an arithmetic number, because the mean of its divisors is an integer number (2856672).

Almost surely, 2^33138385 is an apocalyptic number.

33138385 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

33138385 is a deficient number, since it is larger than the sum of its proper divisors (12568367).

33138385 is a wasteful number, since it uses less digits than its factorization.

33138385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424.

The product of its digits is 25920, while the sum is 34.

The square root of 33138385 is about 5756.5949136621. The cubic root of 33138385 is about 321.2011659483.

The spelling of 33138385 in words is "thirty-three million, one hundred thirty-eight thousand, three hundred eighty-five".