33890709 has 4 divisors (see below), whose sum is σ = 45187616. Its totient is φ = 22593804.

The previous prime is 33890693. The next prime is 33890711. The reversal of 33890709 is 90709833.

It is a happy number.

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.

It is not a de Polignac number, because 33890709 - 2⁴ = 33890693 is a prime.

It is a super-2 number, since 2×33890709² = 2297160313045362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33890729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5648449 + ... + 5648454.

It is an arithmetic number, because the mean of its divisors is an integer number (11296904).

Almost surely, 2^33890709 is an apocalyptic number.

It is an amenable number.

33890709 is a deficient number, since it is larger than the sum of its proper divisors (11296907).

33890709 is a wasteful number, since it uses less digits than its factorization.

33890709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11296906.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 33890709 is about 5821.5727256473. The cubic root of 33890709 is about 323.6136894796.

The spelling of 33890709 in words is "thirty-three million, eight hundred ninety thousand, seven hundred nine".