40009503 has 8 divisors (see below), whose sum is σ = 53554608. Its totient is φ = 26568704.

The previous prime is 40009477. The next prime is 40009511. The reversal of 40009503 is 30590004.

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 40009503 - 2⁶ = 40009439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40009503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40009513) 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, 25176 + ... + 26717.

It is an arithmetic number, because the mean of its divisors is an integer number (6694326).

Almost surely, 2^40009503 is an apocalyptic number.

40009503 is a deficient number, since it is larger than the sum of its proper divisors (13545105).

40009503 is a wasteful number, since it uses less digits than its factorization.

40009503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52153.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 40009503 is about 6325.3065538359. The cubic root of 40009503 is about 342.0222703599.

Adding to 40009503 its reverse (30590004), we get a palindrome (70599507).

The spelling of 40009503 in words is "forty million, nine thousand, five hundred three".