40307945 has 8 divisors (see below), whose sum is σ = 48409920. Its totient is φ = 32219440.

The previous prime is 40307909. The next prime is 40307947. The reversal of 40307945 is 54970304.

40307945 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 40307945 - 2⁶ = 40307881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40307947) 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, 5210 + ... + 10380.

It is an arithmetic number, because the mean of its divisors is an integer number (6051240).

Almost surely, 2^40307945 is an apocalyptic number.

It is an amenable number.

40307945 is a deficient number, since it is larger than the sum of its proper divisors (8101975).

40307945 is a wasteful number, since it uses less digits than its factorization.

40307945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 40307945 is about 6348.8538335671. The cubic root of 40307945 is about 342.8705776399.

The spelling of 40307945 in words is "forty million, three hundred seven thousand, nine hundred forty-five".