33901990 has 32 divisors (see below), whose sum is σ = 63776160. Its totient is φ = 12962304.

The previous prime is 33901951. The next prime is 33901999. The reversal of 33901990 is 9910933.

It is a happy number.

33901990 is nontrivially palindromic in base 9.

It is a super-2 number, since 2×33901990² = 2298689851920200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33901999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21054 + ... + 22606.

It is an arithmetic number, because the mean of its divisors is an integer number (1993005).

Almost surely, 2^33901990 is an apocalyptic number.

33901990 is a deficient number, since it is larger than the sum of its proper divisors (29874170).

33901990 is a wasteful number, since it uses less digits than its factorization.

33901990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 33901990 is about 5822.5415412859. The cubic root of 33901990 is about 323.6495919551.

The spelling of 33901990 in words is "thirty-three million, nine hundred one thousand, nine hundred ninety".