40946781 has 8 divisors (see below), whose sum is σ = 54741280. Its totient is φ = 27225072.

The previous prime is 40946777. The next prime is 40946791. The reversal of 40946781 is 18764904.

It is a happy number.

40946781 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.

It is not a de Polignac number, because 40946781 - 2² = 40946777 is a prime.

It is a super-2 number, since 2×40946781² = 3353277748523922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40946701) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16870 + ... + 19143.

It is an arithmetic number, because the mean of its divisors is an integer number (6842660).

Almost surely, 2^40946781 is an apocalyptic number.

It is an amenable number.

40946781 is a deficient number, since it is larger than the sum of its proper divisors (13794499).

40946781 is a wasteful number, since it uses less digits than its factorization.

40946781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36395.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40946781 is about 6398.9671822881. The cubic root of 40946781 is about 344.6724637691.

The spelling of 40946781 in words is "forty million, nine hundred forty-six thousand, seven hundred eighty-one".