40020505 has 24 divisors (see below), whose sum is σ = 56142720. Its totient is φ = 27306720.

The previous prime is 40020503. The next prime is 40020521. The reversal of 40020505 is 50502004.

It is a happy number.

It is not a de Polignac number, because 40020505 - 2¹ = 40020503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40020503) 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 23 ways as a sum of consecutive naturals, for example, 92640 + ... + 93070.

It is an arithmetic number, because the mean of its divisors is an integer number (2339280).

Almost surely, 2^40020505 is an apocalyptic number.

It is an amenable number.

40020505 is a deficient number, since it is larger than the sum of its proper divisors (16122215).

40020505 is a wasteful number, since it uses less digits than its factorization.

40020505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 40020505 is about 6326.1761752262. The cubic root of 40020505 is about 342.0536177805.

Adding to 40020505 its reverse (50502004), we get a palindrome (90522509).

The spelling of 40020505 in words is "forty million, twenty thousand, five hundred five".