40354985 has 16 divisors (see below), whose sum is σ = 52952832. Its totient is φ = 29280000.

The previous prime is 40354981. The next prime is 40354987. The reversal of 40354985 is 58945304.

It is a happy number.

40354985 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 40354985 - 2² = 40354981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40354981) 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 15 ways as a sum of consecutive naturals, for example, 40817 + ... + 41793.

It is an arithmetic number, because the mean of its divisors is an integer number (3309552).

Almost surely, 2^40354985 is an apocalyptic number.

It is an amenable number.

40354985 is a deficient number, since it is larger than the sum of its proper divisors (12597847).

40354985 is a wasteful number, since it uses less digits than its factorization.

40354985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 40354985 is about 6352.5573590484. The cubic root of 40354985 is about 343.0039042245.

The spelling of 40354985 in words is "forty million, three hundred fifty-four thousand, nine hundred eighty-five".