33189409 has 16 divisors (see below), whose sum is σ = 38304000. Its totient is φ = 28440720.

The previous prime is 33189383. The next prime is 33189439. The reversal of 33189409 is 90498133.

It is not a de Polignac number, because 33189409 - 2⁷ = 33189281 is a prime.

It is a super-2 number, since 2×33189409² = 2203073739538562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33189439) 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, 79002 + ... + 79420.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^33189409 is an apocalyptic number.

It is an amenable number.

33189409 is a deficient number, since it is larger than the sum of its proper divisors (5114591).

33189409 is a wasteful number, since it uses less digits than its factorization.

33189409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 33189409 is about 5761.0249956063. The cubic root of 33189409 is about 321.3659352330.

Subtracting from 33189409 its product of nonzero digits (23328), we obtain a square (33166081 = 5759²).

The spelling of 33189409 in words is "thirty-three million, one hundred eighty-nine thousand, four hundred nine".