40240505 has 4 divisors (see below), whose sum is σ = 48288612. Its totient is φ = 32192400.

The previous prime is 40240483. The next prime is 40240523. The reversal of 40240505 is 50504204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26543104 + 13697401 = 5152^2 + 3701^2 .

It is not a de Polignac number, because 40240505 - 2⁶ = 40240441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4024046 + ... + 4024055.

It is an arithmetic number, because the mean of its divisors is an integer number (12072153).

Almost surely, 2^40240505 is an apocalyptic number.

It is an amenable number.

40240505 is a deficient number, since it is larger than the sum of its proper divisors (8048107).

40240505 is an equidigital number, since it uses as much as digits as its factorization.

40240505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8048106.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40240505 is about 6343.5404152571. The cubic root of 40240505 is about 342.6792497705.

Adding to 40240505 its reverse (50504204), we get a palindrome (90744709).

The spelling of 40240505 in words is "forty million, two hundred forty thousand, five hundred five".