40389171 has 8 divisors (see below), whose sum is σ = 54037200. Its totient is φ = 26833632.

The previous prime is 40389149. The next prime is 40389191. The reversal of 40389171 is 17198304.

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

It is not a de Polignac number, because 40389171 - 2⁷ = 40389043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40389101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22096 + ... + 23853.

It is an arithmetic number, because the mean of its divisors is an integer number (6754650).

Almost surely, 2^40389171 is an apocalyptic number.

40389171 is a deficient number, since it is larger than the sum of its proper divisors (13648029).

40389171 is a wasteful number, since it uses less digits than its factorization.

40389171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46245.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 40389171 is about 6355.2475168163. The cubic root of 40389171 is about 343.1007334174.

The spelling of 40389171 in words is "forty million, three hundred eighty-nine thousand, one hundred seventy-one".