40786945 has 8 divisors (see below), whose sum is σ = 49868136. Its totient is φ = 32013696.

The previous prime is 40786937. The next prime is 40786957. The reversal of 40786945 is 54968704.

It can be written as a sum of positive squares in 4 ways, for example, as 1046529 + 39740416 = 1023^2 + 6304^2 .

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

It is not a de Polignac number, because 40786945 - 2³ = 40786937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76692 + ... + 77221.

It is an arithmetic number, because the mean of its divisors is an integer number (6233517).

Almost surely, 2^40786945 is an apocalyptic number.

It is an amenable number.

40786945 is a deficient number, since it is larger than the sum of its proper divisors (9081191).

40786945 is a wasteful number, since it uses less digits than its factorization.

40786945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153971.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 40786945 is about 6386.4657675431. The cubic root of 40786945 is about 344.2234019609.

The spelling of 40786945 in words is "forty million, seven hundred eighty-six thousand, nine hundred forty-five".