40856537 has 4 divisors (see below), whose sum is σ = 40872420. Its totient is φ = 40840656.

The previous prime is 40856531. The next prime is 40856549. The reversal of 40856537 is 73565804.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4084441 + 36772096 = 2021^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 40856537 - 2⁴ = 40856521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40856537.

It is not an unprimeable number, because it can be changed into a prime (40856531) 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, 3098 + ... + 9555.

It is an arithmetic number, because the mean of its divisors is an integer number (10218105).

Almost surely, 2^40856537 is an apocalyptic number.

It is an amenable number.

40856537 is a deficient number, since it is larger than the sum of its proper divisors (15883).

40856537 is a wasteful number, since it uses less digits than its factorization.

40856537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15882.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 40856537 is about 6391.9118423207. The cubic root of 40856537 is about 344.4190657410.

The spelling of 40856537 in words is "forty million, eight hundred fifty-six thousand, five hundred thirty-seven".