40866849 has 20 divisors (see below), whose sum is σ = 61332480. Its totient is φ = 27117720.

The previous prime is 40866841. The next prime is 40866857. The reversal of 40866849 is 94866804.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40866841) and next prime (40866857).

It is not a de Polignac number, because 40866849 - 2³ = 40866841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40866841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18304 + ... + 20414.

It is an arithmetic number, because the mean of its divisors is an integer number (3066624).

Almost surely, 2^40866849 is an apocalyptic number.

It is an amenable number.

40866849 is a deficient number, since it is larger than the sum of its proper divisors (20465631).

40866849 is a wasteful number, since it uses less digits than its factorization.

40866849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362 (or 2353 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 40866849 is about 6392.7184358456. The cubic root of 40866849 is about 344.4480398939.

Subtracting from 40866849 its sum of digits (45), we obtain a palindrome (40866804).

The spelling of 40866849 in words is "forty million, eight hundred sixty-six thousand, eight hundred forty-nine".