40028171 has 2 divisors, whose sum is σ = 40028172. Its totient is φ = 40028170.

The previous prime is 40028143. The next prime is 40028201. The reversal of 40028171 is 17182004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40028171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40028101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20014085 + 20014086.

It is an arithmetic number, because the mean of its divisors is an integer number (20014086).

Almost surely, 2^40028171 is an apocalyptic number.

40028171 is a deficient number, since it is larger than the sum of its proper divisors (1).

40028171 is an equidigital number, since it uses as much as digits as its factorization.

40028171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 40028171 is about 6326.7820414489. The cubic root of 40028171 is about 342.0754567155.

The spelling of 40028171 in words is "forty million, twenty-eight thousand, one hundred seventy-one".