33668390 has 24 divisors (see below), whose sum is σ = 70498512. Its totient is φ = 11543280.

The previous prime is 33668363. The next prime is 33668417. The reversal of 33668390 is 9386633.

It is an interprime number because it is at equal distance from previous prime (33668363) and next prime (33668417).

It is a super-2 number, since 2×33668390² = 2267120970384200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 33866 + ... + 34845.

It is an arithmetic number, because the mean of its divisors is an integer number (2937438).

Almost surely, 2^33668390 is an apocalyptic number.

33668390 is an abundant number, since it is smaller than the sum of its proper divisors (36830122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33668390 is a wasteful number, since it uses less digits than its factorization.

33668390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68732 (or 68725 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 33668390 is about 5802.4468976459. The cubic root of 33668390 is about 322.9045141363.

The spelling of 33668390 in words is "thirty-three million, six hundred sixty-eight thousand, three hundred ninety".