40304023 has 4 divisors (see below), whose sum is σ = 40594120. Its totient is φ = 40013928.

The previous prime is 40303993. The next prime is 40304041. The reversal of 40304023 is 32040304.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40304023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40303988 and 40304006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40304083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144840 + ... + 145117.

It is an arithmetic number, because the mean of its divisors is an integer number (10148530).

Almost surely, 2^40304023 is an apocalyptic number.

40304023 is a deficient number, since it is larger than the sum of its proper divisors (290097).

40304023 is a wasteful number, since it uses less digits than its factorization.

40304023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290096.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 40304023 is about 6348.5449514042. The cubic root of 40304023 is about 342.8594567387.

Adding to 40304023 its reverse (32040304), we get a palindrome (72344327).

The spelling of 40304023 in words is "forty million, three hundred four thousand, twenty-three".