33890 has 8 divisors (see below), whose sum is σ = 61020. Its totient is φ = 13552.

The previous prime is 33889. The next prime is 33893. The reversal of 33890 is 9833.

It can be written as a sum of positive squares in 2 ways, for example, as 32041 + 1849 = 179^2 + 43^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×33890² = 2297064200, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (33893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1685 + ... + 1704.

2³³⁸⁹⁰ is an apocalyptic number.

33890 is a deficient number, since it is larger than the sum of its proper divisors (27130).

33890 is a wasteful number, since it uses less digits than its factorization.

33890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 33890 is about 184.0923681199. The cubic root of 33890 is about 32.3611432777.

The spelling of 33890 in words is "thirty-three thousand, eight hundred ninety".