32640738 has 16 divisors (see below), whose sum is σ = 70303296. Its totient is φ = 10043280.

The previous prime is 32640721. The next prime is 32640763. The reversal of 32640738 is 83704623.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 32640699 and 32640708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209158 + ... + 209313.

It is an arithmetic number, because the mean of its divisors is an integer number (4393956).

Almost surely, 2^32640738 is an apocalyptic number.

32640738 is an abundant number, since it is smaller than the sum of its proper divisors (37662558).

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

32640738 is a wasteful number, since it uses less digits than its factorization.

32640738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418489.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 32640738 is about 5713.2073303881. The cubic root of 32640738 is about 319.5851982203.

The spelling of 32640738 in words is "thirty-two million, six hundred forty thousand, seven hundred thirty-eight".