33890393 has 4 divisors (see below), whose sum is σ = 33942480. Its totient is φ = 33838308.

The previous prime is 33890383. The next prime is 33890411. The reversal of 33890393 is 39309833.

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 a cyclic number.

It is not a de Polignac number, because 33890393 - 2⁸ = 33890137 is a prime.

It is a super-2 number, since 2×33890393² = 2297117475388898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33890383) 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, 25055 + ... + 26372.

It is an arithmetic number, because the mean of its divisors is an integer number (8485620).

Almost surely, 2^33890393 is an apocalyptic number.

It is an amenable number.

33890393 is a deficient number, since it is larger than the sum of its proper divisors (52087).

33890393 is an equidigital number, since it uses as much as digits as its factorization.

33890393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52086.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 33890393 is about 5821.5455851518. The cubic root of 33890393 is about 323.6126836755.

The spelling of 33890393 in words is "thirty-three million, eight hundred ninety thousand, three hundred ninety-three".