33890217 has 16 divisors (see below), whose sum is σ = 46282752. Its totient is φ = 22052240.

The previous prime is 33890203. The next prime is 33890237. The reversal of 33890217 is 71209833.

It is a cyclic number.

It is not a de Polignac number, because 33890217 - 2¹⁸ = 33628073 is a prime.

It is a super-2 number, since 2×33890217² = 2297093616614178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33890237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22048 + ... + 23534.

It is an arithmetic number, because the mean of its divisors is an integer number (2892672).

Almost surely, 2^33890217 is an apocalyptic number.

It is an amenable number.

33890217 is a deficient number, since it is larger than the sum of its proper divisors (12392535).

33890217 is a wasteful number, since it uses less digits than its factorization.

33890217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 33890217 is about 5821.5304688716. The cubic root of 33890217 is about 323.6121234781.

The spelling of 33890217 in words is "thirty-three million, eight hundred ninety thousand, two hundred seventeen".