40042847 has 8 divisors (see below), whose sum is σ = 44126544. Its totient is φ = 36102528.

The previous prime is 40042841. The next prime is 40042853. The reversal of 40042847 is 74824004.

It is an interprime number because it is at equal distance from previous prime (40042841) and next prime (40042853).

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 40042847 - 2¹⁰ = 40041823 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 (40042841) 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, 35258 + ... + 36375.

It is an arithmetic number, because the mean of its divisors is an integer number (5515818).

Almost surely, 2^40042847 is an apocalyptic number.

40042847 is a deficient number, since it is larger than the sum of its proper divisors (4083697).

40042847 is a wasteful number, since it uses less digits than its factorization.

40042847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71689.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 40042847 is about 6327.9417664830. The cubic root of 40042847 is about 342.1172579924.

The spelling of 40042847 in words is "forty million, forty-two thousand, eight hundred forty-seven".