40686843 has 4 divisors (see below), whose sum is σ = 54249128. Its totient is φ = 27124560.

The previous prime is 40686827. The next prime is 40686853. The reversal of 40686843 is 34868604.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40686843 - 2⁴ = 40686827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40686823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6781138 + ... + 6781143.

It is an arithmetic number, because the mean of its divisors is an integer number (13562282).

Almost surely, 2^40686843 is an apocalyptic number.

40686843 is a deficient number, since it is larger than the sum of its proper divisors (13562285).

40686843 is a wasteful number, since it uses less digits than its factorization.

40686843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13562284.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 40686843 is about 6378.6239111583. The cubic root of 40686843 is about 343.9415660391.

The spelling of 40686843 in words is "forty million, six hundred eighty-six thousand, eight hundred forty-three".