33409990 has 16 divisors (see below), whose sum is σ = 60864048. Its totient is φ = 13202656.

The previous prime is 33409979. The next prime is 33409991. The reversal of 33409990 is 9990433.

33409990 = 593² + 594² + ... + 675².

It is a super-2 number, since 2×33409990² = 2232454863600200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33409991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19297 + ... + 20956.

It is an arithmetic number, because the mean of its divisors is an integer number (3804003).

Almost surely, 2^33409990 is an apocalyptic number.

33409990 is a deficient number, since it is larger than the sum of its proper divisors (27454058).

33409990 is a wasteful number, since it uses less digits than its factorization.

33409990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40343.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 33409990 is about 5780.1375416161. The cubic root of 33409990 is about 322.0763099878.

The spelling of 33409990 in words is "thirty-three million, four hundred nine thousand, nine hundred ninety".