40354394 has 8 divisors (see below), whose sum is σ = 60680820. Its totient is φ = 20127456.

The previous prime is 40354387. The next prime is 40354409. The reversal of 40354394 is 49345304.

40354394 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 2 ways, for example, as 27300625 + 13053769 = 5225^2 + 3613^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 40354394.

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 3 ways as a sum of consecutive naturals, for example, 23849 + ... + 25484.

Almost surely, 2^40354394 is an apocalyptic number.

40354394 is a deficient number, since it is larger than the sum of its proper divisors (20326426).

40354394 is a wasteful number, since it uses less digits than its factorization.

40354394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49744.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 40354394 is about 6352.5108421789. The cubic root of 40354394 is about 343.0022297820.

Adding to 40354394 its reverse (49345304), we get a palindrome (89699698).

The spelling of 40354394 in words is "forty million, three hundred fifty-four thousand, three hundred ninety-four".