32640006 has 16 divisors (see below), whose sum is σ = 74605824. Its totient is φ = 9325704.

The previous prime is 32640001. The next prime is 32640007. The reversal of 32640006 is 60004623.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32640001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388530 + ... + 388613.

It is an arithmetic number, because the mean of its divisors is an integer number (4662864).

Almost surely, 2^32640006 is an apocalyptic number.

32640006 is an abundant number, since it is smaller than the sum of its proper divisors (41965818).

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

32640006 is a wasteful number, since it uses less digits than its factorization.

32640006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777155.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 32640006 is about 5713.1432679393. The cubic root of 32640006 is about 319.5828092004.

Adding to 32640006 its reverse (60004623), we get a palindrome (92644629).

The spelling of 32640006 in words is "thirty-two million, six hundred forty thousand, six".