33688090 has 8 divisors (see below), whose sum is σ = 60638580. Its totient is φ = 13475232.

The previous prime is 33688087. The next prime is 33688097. The reversal of 33688090 is 9088633.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31911201 + 1776889 = 5649^2 + 1333^2 .

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

It is a super-2 number, since 2×33688090² = 2269774815696200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33688097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684395 + ... + 1684414.

Almost surely, 2^33688090 is an apocalyptic number.

33688090 is a deficient number, since it is larger than the sum of its proper divisors (26950490).

33688090 is a wasteful number, since it uses less digits than its factorization.

33688090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368816.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 33688090 is about 5804.1442090975. The cubic root of 33688090 is about 322.9674809987.

The spelling of 33688090 in words is "thirty-three million, six hundred eighty-eight thousand, ninety".