32566640 has 20 divisors (see below), whose sum is σ = 75717624. Its totient is φ = 13026624.

The previous prime is 32566637. The next prime is 32566649. The reversal of 32566640 is 4666523.

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

It is a junction number, because it is equal to n+sod(n) for n = 32566597 and 32566606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32566649) 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, 203462 + ... + 203621.

Almost surely, 2^32566640 is an apocalyptic number.

It is an amenable number.

32566640 is an abundant number, since it is smaller than the sum of its proper divisors (43150984).

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

32566640 is a wasteful number, since it uses less digits than its factorization.

32566640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407096 (or 407090 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 32566640 is about 5706.7188471135. The cubic root of 32566640 is about 319.3431840248.

The spelling of 32566640 in words is "thirty-two million, five hundred sixty-six thousand, six hundred forty".