32166640 has 60 divisors (see below), whose sum is σ = 82229112. Its totient is φ = 11693440.

The previous prime is 32166619. The next prime is 32166643. The reversal of 32166640 is 4666123.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 32166599 and 32166608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32166643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8019 + ... + 11341.

Almost surely, 2^32166640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32166640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41114556).

32166640 is an abundant number, since it is smaller than the sum of its proper divisors (50062472).

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

32166640 is a wasteful number, since it uses less digits than its factorization.

32166640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3358 (or 3341 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 32166640 is about 5671.5641581490. The cubic root of 32166640 is about 318.0303492783.

The spelling of 32166640 in words is "thirty-two million, one hundred sixty-six thousand, six hundred forty".