40004647 has 4 divisors (see below), whose sum is σ = 40022080. Its totient is φ = 39987216.

The previous prime is 40004611. The next prime is 40004651. The reversal of 40004647 is 74640004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40004647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4638 + ... + 10075.

It is an arithmetic number, because the mean of its divisors is an integer number (10005520).

Almost surely, 2^40004647 is an apocalyptic number.

40004647 is a deficient number, since it is larger than the sum of its proper divisors (17433).

40004647 is a wasteful number, since it uses less digits than its factorization.

40004647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17432.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 40004647 is about 6324.9226872745. The cubic root of 40004647 is about 342.0084325862.

The spelling of 40004647 in words is "forty million, four thousand, six hundred forty-seven".