40507945 has 16 divisors (see below), whose sum is σ = 51057792. Its totient is φ = 30792960.

The previous prime is 40507939. The next prime is 40507949. The reversal of 40507945 is 54970504.

It is not a de Polignac number, because 40507945 - 2⁵ = 40507913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40507945.

It is not an unprimeable number, because it can be changed into a prime (40507949) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17665 + ... + 19825.

It is an arithmetic number, because the mean of its divisors is an integer number (3191112).

Almost surely, 2^40507945 is an apocalyptic number.

It is an amenable number.

40507945 is a deficient number, since it is larger than the sum of its proper divisors (10549847).

40507945 is a wasteful number, since it uses less digits than its factorization.

40507945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 40507945 is about 6364.5852182212. The cubic root of 40507945 is about 343.4367274821.

The spelling of 40507945 in words is "forty million, five hundred seven thousand, nine hundred forty-five".