33680390 has 16 divisors (see below), whose sum is σ = 61193232. Its totient is φ = 13345824.

The previous prime is 33680371. The next prime is 33680401. The reversal of 33680390 is 9308633.

It is a happy number.

It is a super-2 number, since 2×33680390² = 2268737341104200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14669 + ... + 16808.

It is an arithmetic number, because the mean of its divisors is an integer number (3824577).

Almost surely, 2^33680390 is an apocalyptic number.

33680390 is a deficient number, since it is larger than the sum of its proper divisors (27512842).

33680390 is a wasteful number, since it uses less digits than its factorization.

33680390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31591.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 33680390 is about 5803.4808520404. The cubic root of 33680390 is about 322.9428725085.

The spelling of 33680390 in words is "thirty-three million, six hundred eighty thousand, three hundred ninety".