40047071 has 8 divisors (see below), whose sum is σ = 43137024. Its totient is φ = 37069560.

The previous prime is 40047031. The next prime is 40047083. The reversal of 40047071 is 17074004.

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

It is a de Polignac number, because none of the positive numbers 2^k-40047071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40047001) 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, 27371 + ... + 28796.

It is an arithmetic number, because the mean of its divisors is an integer number (5392128).

Almost surely, 2^40047071 is an apocalyptic number.

40047071 is a deficient number, since it is larger than the sum of its proper divisors (3089953).

40047071 is a wasteful number, since it uses less digits than its factorization.

40047071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56221.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 40047071 is about 6328.2755154939. The cubic root of 40047071 is about 342.1292872111.

The spelling of 40047071 in words is "forty million, forty-seven thousand, seventy-one".