40856387 has 8 divisors (see below), whose sum is σ = 47999280. Its totient is φ = 34284960.

The previous prime is 40856371. The next prime is 40856449. The reversal of 40856387 is 78365804.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40856387 - 2⁴ = 40856371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40856087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142712 + ... + 142997.

It is an arithmetic number, because the mean of its divisors is an integer number (5999910).

Almost surely, 2^40856387 is an apocalyptic number.

40856387 is a deficient number, since it is larger than the sum of its proper divisors (7142893).

40856387 is a wasteful number, since it uses less digits than its factorization.

40856387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285733.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 40856387 is about 6391.9001087314. The cubic root of 40856387 is about 344.4186442424.

The spelling of 40856387 in words is "forty million, eight hundred fifty-six thousand, three hundred eighty-seven".