40856919 has 4 divisors (see below), whose sum is σ = 54475896. Its totient is φ = 27237944.

The previous prime is 40856909. The next prime is 40856941. The reversal of 40856919 is 91965804.

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

It is a cyclic number.

It is not a de Polignac number, because 40856919 - 2⁸ = 40856663 is a prime.

It is a super-2 number, since 2×40856919² = 3338575660345122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40856909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6809484 + ... + 6809489.

It is an arithmetic number, because the mean of its divisors is an integer number (13618974).

Almost surely, 2^40856919 is an apocalyptic number.

40856919 is a deficient number, since it is larger than the sum of its proper divisors (13618977).

40856919 is a wasteful number, since it uses less digits than its factorization.

40856919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13618976.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 40856919 is about 6391.9417237644. The cubic root of 40856919 is about 344.4201391529.

The spelling of 40856919 in words is "forty million, eight hundred fifty-six thousand, nine hundred nineteen".