40438093 has 4 divisors (see below), whose sum is σ = 41832540. Its totient is φ = 39043648.

The previous prime is 40438081. The next prime is 40438141. The reversal of 40438093 is 39083404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28068804 + 12369289 = 5298^2 + 3517^2 .

It is a cyclic number.

It is not a de Polignac number, because 40438093 - 2⁹ = 40437581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40438033) 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 3 ways as a sum of consecutive naturals, for example, 697180 + ... + 697237.

It is an arithmetic number, because the mean of its divisors is an integer number (10458135).

Almost surely, 2^40438093 is an apocalyptic number.

It is an amenable number.

40438093 is a deficient number, since it is larger than the sum of its proper divisors (1394447).

40438093 is a wasteful number, since it uses less digits than its factorization.

40438093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394446.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 40438093 is about 6359.0952972888. The cubic root of 40438093 is about 343.2392061906.

The spelling of 40438093 in words is "forty million, four hundred thirty-eight thousand, ninety-three".