40023013 has 8 divisors (see below), whose sum is σ = 41827968. Its totient is φ = 38223504.

The previous prime is 40023007. The next prime is 40023041. The reversal of 40023013 is 31032004.

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 40023013 - 2⁹ = 40022501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40022984 and 40023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40023413) 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, 23631 + ... + 25267.

It is an arithmetic number, because the mean of its divisors is an integer number (5228496).

Almost surely, 2^40023013 is an apocalyptic number.

It is an amenable number.

40023013 is a deficient number, since it is larger than the sum of its proper divisors (1804955).

40023013 is a wasteful number, since it uses less digits than its factorization.

40023013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 40023013 is about 6326.3743961293. The cubic root of 40023013 is about 342.0607628890.

Adding to 40023013 its reverse (31032004), we get a palindrome (71055017).

The spelling of 40023013 in words is "forty million, twenty-three thousand, thirteen".