33331998 has 32 divisors (see below), whose sum is σ = 76909824. Its totient is φ = 9433152.

The previous prime is 33331997. The next prime is 33332003. The reversal of 33331998 is 89913333.

It is a happy number.

It is a super-2 number, since 2×33331998² = 2222044181344008, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33331997) 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, 786 + ... + 8202.

It is an arithmetic number, because the mean of its divisors is an integer number (2403432).

Almost surely, 2^33331998 is an apocalyptic number.

33331998 is an abundant number, since it is smaller than the sum of its proper divisors (43577826).

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

33331998 is a wasteful number, since it uses less digits than its factorization.

33331998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7536.

The product of its digits is 52488, while the sum is 39.

The square root of 33331998 is about 5773.3870474791. The cubic root of 33331998 is about 321.8254973106.

The spelling of 33331998 in words is "thirty-three million, three hundred thirty-one thousand, nine hundred ninety-eight".