40505023 has 8 divisors (see below), whose sum is σ = 44549568. Its totient is φ = 36593184.

The previous prime is 40505021. The next prime is 40505029. The reversal of 40505023 is 32050504.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40505023 - 2¹ = 40505021 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 (40505021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32536 + ... + 33757.

It is an arithmetic number, because the mean of its divisors is an integer number (5568696).

Almost surely, 2^40505023 is an apocalyptic number.

40505023 is a deficient number, since it is larger than the sum of its proper divisors (4044545).

40505023 is a wasteful number, since it uses less digits than its factorization.

40505023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66353.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 40505023 is about 6364.3556625946. The cubic root of 40505023 is about 343.4284694622.

Adding to 40505023 its reverse (32050504), we get a palindrome (72555527).

The spelling of 40505023 in words is "forty million, five hundred five thousand, twenty-three".