33856385 has 12 divisors (see below), whose sum is σ = 42880788. Its totient is φ = 25658208.

The previous prime is 33856379. The next prime is 33856397. The reversal of 33856385 is 58365833.

It can be written as a sum of positive squares in 2 ways, for example, as 16224784 + 17631601 = 4028^2 + 4199^2 .

It is not a de Polignac number, because 33856385 - 2¹⁸ = 33594241 is a prime.

It is a super-2 number, since 2×33856385² = 2292509610536450, which contains 22 as substring.

It is a Duffinian number.

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, 7574 + ... + 11183.

It is an arithmetic number, because the mean of its divisors is an integer number (3573399).

Almost surely, 2^33856385 is an apocalyptic number.

It is an amenable number.

33856385 is a deficient number, since it is larger than the sum of its proper divisors (9024403).

33856385 is a wasteful number, since it uses less digits than its factorization.

33856385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18800 (or 18781 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 33856385 is about 5818.6239782272. The cubic root of 33856385 is about 323.5044022184.

The spelling of 33856385 in words is "thirty-three million, eight hundred fifty-six thousand, three hundred eighty-five".