33091998 has 8 divisors (see below), whose sum is σ = 66184008. Its totient is φ = 11030664.

The previous prime is 33091991. The next prime is 33092011. The reversal of 33091998 is 89919033.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

33091998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33091991) 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, 2757661 + ... + 2757672.

It is an arithmetic number, because the mean of its divisors is an integer number (8273001).

Almost surely, 2^33091998 is an apocalyptic number.

33091998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33091998 is a wasteful number, since it uses less digits than its factorization.

33091998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515338.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 33091998 is about 5752.5644716074. The cubic root of 33091998 is about 321.0512238593.

The spelling of 33091998 in words is "thirty-three million, ninety-one thousand, nine hundred ninety-eight".