33890689 has 4 divisors (see below), whose sum is σ = 38732224. Its totient is φ = 29049156.

The previous prime is 33890669. The next prime is 33890693. The reversal of 33890689 is 98609833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98609833 = 7 ⋅14087119.

It is a cyclic number.

It is not a de Polignac number, because 33890689 - 2²¹ = 31793537 is a prime.

It is a super-2 number, since 2×33890689² = 2297157601789442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33890629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2420757 + ... + 2420770.

It is an arithmetic number, because the mean of its divisors is an integer number (9683056).

Almost surely, 2^33890689 is an apocalyptic number.

It is an amenable number.

33890689 is a deficient number, since it is larger than the sum of its proper divisors (4841535).

33890689 is an equidigital number, since it uses as much as digits as its factorization.

33890689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841534.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 33890689 is about 5821.5710078981. The cubic root of 33890689 is about 323.6136258213.

The spelling of 33890689 in words is "thirty-three million, eight hundred ninety thousand, six hundred eighty-nine".