404040355 has 4 divisors (see below), whose sum is σ = 484848432. Its totient is φ = 323232280.

The previous prime is 404040353. The next prime is 404040361. The reversal of 404040355 is 553040404.

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

It is not a de Polignac number, because 404040355 - 2¹ = 404040353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404040353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40404031 + ... + 40404040.

It is an arithmetic number, because the mean of its divisors is an integer number (121212108).

Almost surely, 2^404040355 is an apocalyptic number.

404040355 is a deficient number, since it is larger than the sum of its proper divisors (80808077).

404040355 is an equidigital number, since it uses as much as digits as its factorization.

404040355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80808076.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 404040355 is about 20100.7550853196. The cubic root of 404040355 is about 739.2787927103.

Adding to 404040355 its reverse (553040404), we get a palindrome (957080759).

The spelling of 404040355 in words is "four hundred four million, forty thousand, three hundred fifty-five".