33331990 has 8 divisors (see below), whose sum is σ = 59997600. Its totient is φ = 13332792.

The previous prime is 33331981. The next prime is 33331997. The reversal of 33331990 is 9913333.

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

It is a super-2 number, since 2×33331990² = 2222043114720200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1666590 + ... + 1666609.

It is an arithmetic number, because the mean of its divisors is an integer number (7499700).

Almost surely, 2^33331990 is an apocalyptic number.

33331990 is a deficient number, since it is larger than the sum of its proper divisors (26665610).

33331990 is a wasteful number, since it uses less digits than its factorization.

33331990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333206.

The product of its (nonzero) digits is 6561, while the sum is 31.

The square root of 33331990 is about 5773.3863546449. The cubic root of 33331990 is about 321.8254715636.

It can be divided in two parts, 333 and 31990, that added together give a palindrome (32323).

The spelling of 33331990 in words is "thirty-three million, three hundred thirty-one thousand, nine hundred ninety".