27640506 has 8 divisors (see below), whose sum is σ = 55281024. Its totient is φ = 9213500.

The previous prime is 27640493. The next prime is 27640523. The reversal of 27640506 is 60504672.

It is a sphenic number, since it is the product of 3 distinct primes.

27640506 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 2303370 + ... + 2303381.

It is an arithmetic number, because the mean of its divisors is an integer number (6910128).

Almost surely, 2^27640506 is an apocalyptic number.

27640506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27640506 is a wasteful number, since it uses less digits than its factorization.

27640506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606756.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 27640506 is about 5257.4238938857. The cubic root of 27640506 is about 302.3537293430.

The spelling of 27640506 in words is "twenty-seven million, six hundred forty thousand, five hundred six".