33870681 has 24 divisors (see below), whose sum is σ = 55790280. Its totient is φ = 19616256.

The previous prime is 33870679. The next prime is 33870701. The reversal of 33870681 is 18607833.

It can be written as a sum of positive squares in 4 ways, for example, as 7952400 + 25918281 = 2820^2 + 5091^2 .

It is not a de Polignac number, because 33870681 - 2¹ = 33870679 is a prime.

It is a super-2 number, since 2×33870681² = 2294446062807522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33870611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6526 + ... + 10503.

It is an arithmetic number, because the mean of its divisors is an integer number (2324595).

Almost surely, 2^33870681 is an apocalyptic number.

It is an amenable number.

33870681 is a deficient number, since it is larger than the sum of its proper divisors (21919599).

33870681 is a wasteful number, since it uses less digits than its factorization.

33870681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17065 (or 17062 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 33870681 is about 5819.8523177139. The cubic root of 33870681 is about 323.5499295061.

The spelling of 33870681 in words is "thirty-three million, eight hundred seventy thousand, six hundred eighty-one".