40945491 has 12 divisors (see below), whose sum is σ = 59596680. Its totient is φ = 27087840.

The previous prime is 40945453. The next prime is 40945493. The reversal of 40945491 is 19454904.

It is a happy number.

40945491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40945491 - 2⁶ = 40945427 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40945493) 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 11 ways as a sum of consecutive naturals, for example, 16186 + ... + 18543.

It is an arithmetic number, because the mean of its divisors is an integer number (4966390).

Almost surely, 2^40945491 is an apocalyptic number.

40945491 is a deficient number, since it is larger than the sum of its proper divisors (18651189).

40945491 is a wasteful number, since it uses less digits than its factorization.

40945491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34866 (or 34863 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 40945491 is about 6398.8663839777. The cubic root of 40945491 is about 344.6688441753.

The spelling of 40945491 in words is "forty million, nine hundred forty-five thousand, four hundred ninety-one".