40840385 has 8 divisors (see below), whose sum is σ = 49367016. Its totient is φ = 32433280.

The previous prime is 40840379. The next prime is 40840403. The reversal of 40840385 is 58304804.

40840385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11235904 + 29604481 = 3352^2 + 5441^2 .

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

It is not a de Polignac number, because 40840385 - 2¹⁴ = 40824001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 29126 + ... + 30495.

It is an arithmetic number, because the mean of its divisors is an integer number (6170877).

Almost surely, 2^40840385 is an apocalyptic number.

It is an amenable number.

40840385 is a deficient number, since it is larger than the sum of its proper divisors (8526631).

40840385 is a wasteful number, since it uses less digits than its factorization.

40840385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59763.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 40840385 is about 6390.6482456790. The cubic root of 40840385 is about 344.3736728418.

The spelling of 40840385 in words is "forty million, eight hundred forty thousand, three hundred eighty-five".