33640916 has 6 divisors (see below), whose sum is σ = 58871610. Its totient is φ = 16820456.

The previous prime is 33640913. The next prime is 33640961. The reversal of 33640916 is 61904633.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23078416 + 10562500 = 4804^2 + 3250^2 .

It is a super-2 number, since 2×33640916² = 2263422458638112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33640913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4205111 + ... + 4205118.

It is an arithmetic number, because the mean of its divisors is an integer number (9811935).

Almost surely, 2^33640916 is an apocalyptic number.

It is an amenable number.

33640916 is a deficient number, since it is larger than the sum of its proper divisors (25230694).

33640916 is a wasteful number, since it uses less digits than its factorization.

33640916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410233 (or 8410231 counting only the distinct ones).

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

The square root of 33640916 is about 5800.0789649797. The cubic root of 33640916 is about 322.8166583086.

The spelling of 33640916 in words is "thirty-three million, six hundred forty thousand, nine hundred sixteen".