40016023 has 4 divisors (see below), whose sum is σ = 40237288. Its totient is φ = 39794760.

The previous prime is 40015999. The next prime is 40016051. The reversal of 40016023 is 32061004.

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-40016023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40015988 and 40016006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40016083) 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, 110361 + ... + 110722.

It is an arithmetic number, because the mean of its divisors is an integer number (10059322).

Almost surely, 2^40016023 is an apocalyptic number.

40016023 is a deficient number, since it is larger than the sum of its proper divisors (221265).

40016023 is a wasteful number, since it uses less digits than its factorization.

40016023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221264.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40016023 is about 6325.8219228809. The cubic root of 40016023 is about 342.0408481469.

Adding to 40016023 its reverse (32061004), we get a palindrome (72077027).

The spelling of 40016023 in words is "forty million, sixteen thousand, twenty-three".