40404505 has 4 divisors (see below), whose sum is σ = 48485412. Its totient is φ = 32323600.

The previous prime is 40404499. The next prime is 40404517. The reversal of 40404505 is 50540404.

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 20575296 + 19829209 = 4536^2 + 4453^2 .

It is not a de Polignac number, because 40404505 - 2²³ = 32015897 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, 4040446 + ... + 4040455.

It is an arithmetic number, because the mean of its divisors is an integer number (12121353).

Almost surely, 2^40404505 is an apocalyptic number.

It is an amenable number.

40404505 is a deficient number, since it is larger than the sum of its proper divisors (8080907).

40404505 is an equidigital number, since it uses as much as digits as its factorization.

40404505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080906.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 40404505 is about 6356.4538069587. The cubic root of 40404505 is about 343.1441480329.

Adding to 40404505 its reverse (50540404), we get a palindrome (90944909).

The spelling of 40404505 in words is "forty million, four hundred four thousand, five hundred five".