40023663 has 4 divisors (see below), whose sum is σ = 53364888. Its totient is φ = 26682440.

The previous prime is 40023631. The next prime is 40023689. The reversal of 40023663 is 36632004.

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

It is a cyclic number.

It is not a de Polignac number, because 40023663 - 2⁵ = 40023631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40023463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6670608 + ... + 6670613.

It is an arithmetic number, because the mean of its divisors is an integer number (13341222).

Almost surely, 2^40023663 is an apocalyptic number.

40023663 is a deficient number, since it is larger than the sum of its proper divisors (13341225).

40023663 is a wasteful number, since it uses less digits than its factorization.

40023663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13341224.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 40023663 is about 6326.4257681569. The cubic root of 40023663 is about 342.0626146428.

Adding to 40023663 its reverse (36632004), we get a palindrome (76655667).

The spelling of 40023663 in words is "forty million, twenty-three thousand, six hundred sixty-three".