32640506 has 4 divisors (see below), whose sum is σ = 48960762. Its totient is φ = 16320252.

The previous prime is 32640481. The next prime is 32640529. The reversal of 32640506 is 60504623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60504623 = 97 ⋅623759.

It can be written as a sum of positive squares in only one way, i.e., 32024281 + 616225 = 5659^2 + 785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160125 + ... + 8160128.

Almost surely, 2^32640506 is an apocalyptic number.

32640506 is a deficient number, since it is larger than the sum of its proper divisors (16320256).

32640506 is a wasteful number, since it uses less digits than its factorization.

32640506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16320255.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 32640506 is about 5713.1870265203. The cubic root of 32640506 is about 319.5844410485.

The spelling of 32640506 in words is "thirty-two million, six hundred forty thousand, five hundred six".