33382640 has 20 divisors (see below), whose sum is σ = 77614824. Its totient is φ = 13353024.

The previous prime is 33382619. The next prime is 33382649. The reversal of 33382640 is 4628333.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×33382640² = 2228801306739200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33382649) 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, 208562 + ... + 208721.

Almost surely, 2^33382640 is an apocalyptic number.

It is an amenable number.

33382640 is an abundant number, since it is smaller than the sum of its proper divisors (44232184).

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

33382640 is a wasteful number, since it uses less digits than its factorization.

33382640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417296 (or 417290 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 33382640 is about 5777.7711965774. The cubic root of 33382640 is about 321.9884002354.

The spelling of 33382640 in words is "thirty-three million, three hundred eighty-two thousand, six hundred forty".