33385664 has 28 divisors (see below), whose sum is σ = 71347584. Its totient is φ = 15408384.

The previous prime is 33385661. The next prime is 33385669. The reversal of 33385664 is 46658333.

It is a super-2 number, since 2×33385664² = 2229205121441792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33385661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19232 + ... + 20895.

It is an arithmetic number, because the mean of its divisors is an integer number (2548128).

Almost surely, 2^33385664 is an apocalyptic number.

It is an amenable number.

33385664 is an abundant number, since it is smaller than the sum of its proper divisors (37961920).

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

33385664 is a wasteful number, since it uses less digits than its factorization.

33385664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40152 (or 40142 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 33385664 is about 5778.0328832571. The cubic root of 33385664 is about 321.9981224895.

The spelling of 33385664 in words is "thirty-three million, three hundred eighty-five thousand, six hundred sixty-four".