40646871 has 12 divisors (see below), whose sum is σ = 61802520. Its totient is φ = 25671600.

The previous prime is 40646849. The next prime is 40646887. The reversal of 40646871 is 17864604.

40646871 is a `hidden beast` number, since 4 + 0 + 646 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 40646871 - 2⁶ = 40646807 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118680 + ... + 119021.

It is an arithmetic number, because the mean of its divisors is an integer number (5150210).

Almost surely, 2^40646871 is an apocalyptic number.

40646871 is a deficient number, since it is larger than the sum of its proper divisors (21155649).

40646871 is a wasteful number, since it uses less digits than its factorization.

40646871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237726 (or 237723 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 40646871 is about 6375.4898635321. The cubic root of 40646871 is about 343.8288962267.

The spelling of 40646871 in words is "forty million, six hundred forty-six thousand, eight hundred seventy-one".