40643286 has 8 divisors (see below), whose sum is σ = 81286584. Its totient is φ = 13547760.

The previous prime is 40643269. The next prime is 40643321. The reversal of 40643286 is 68234604.

40643286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

40643286 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3386935 + ... + 3386946.

It is an arithmetic number, because the mean of its divisors is an integer number (10160823).

Almost surely, 2^40643286 is an apocalyptic number.

40643286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40643286 is a wasteful number, since it uses less digits than its factorization.

40643286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773886.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 40643286 is about 6375.2087024661. The cubic root of 40643286 is about 343.8187875123.

The spelling of 40643286 in words is "forty million, six hundred forty-three thousand, two hundred eighty-six".