40647 has 8 divisors (see below), whose sum is σ = 57456. Its totient is φ = 25472.

The previous prime is 40639. The next prime is 40693. The reversal of 40647 is 74604.

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

It is a cyclic number.

It is not a de Polignac number, because 40647 - 2³ = 40639 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40647.

It is not an unprimeable number, because it can be changed into a prime (40627) 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, 348 + ... + 449.

It is an arithmetic number, because the mean of its divisors is an integer number (7182).

2⁴⁰⁶⁴⁷ is an apocalyptic number.

40647 is a deficient number, since it is larger than the sum of its proper divisors (16809).

40647 is a wasteful number, since it uses less digits than its factorization.

40647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40647 is about 201.6110116040. The cubic root of 40647 is about 34.3829259960.

The spelling of 40647 in words is "forty thousand, six hundred forty-seven".