40013505 has 48 divisors (see below), whose sum is σ = 80645760. Its totient is φ = 17973504.

The previous prime is 40013483. The next prime is 40013507. The reversal of 40013505 is 50531004.

It is not a de Polignac number, because 40013505 - 2⁸ = 40013249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40013507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17509 + ... + 19661.

It is an arithmetic number, because the mean of its divisors is an integer number (1680120).

Almost surely, 2^40013505 is an apocalyptic number.

40013505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40013505 is an abundant number, since it is smaller than the sum of its proper divisors (40632255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40013505 is a wasteful number, since it uses less digits than its factorization.

40013505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230 (or 2227 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 40013505 is about 6325.6228942295. The cubic root of 40013505 is about 342.0336737132.

Adding to 40013505 its reverse (50531004), we get a palindrome (90544509).

The spelling of 40013505 in words is "forty million, thirteen thousand, five hundred five".