404044645 has 4 divisors (see below), whose sum is σ = 484853580. Its totient is φ = 323235712.

The previous prime is 404044609. The next prime is 404044649. The reversal of 404044645 is 546440404.

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 137898049 + 266146596 = 11743^2 + 16314^2 .

It is a cyclic number.

It is not a de Polignac number, because 404044645 - 2⁷ = 404044517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404044649) 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, 40404460 + ... + 40404469.

It is an arithmetic number, because the mean of its divisors is an integer number (121213395).

Almost surely, 2^404044645 is an apocalyptic number.

It is an amenable number.

404044645 is a deficient number, since it is larger than the sum of its proper divisors (80808935).

404044645 is an equidigital number, since it uses as much as digits as its factorization.

404044645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80808934.

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 404044645 is about 20100.8617974454. The cubic root of 404044645 is about 739.2814091938.

The spelling of 404044645 in words is "four hundred four million, forty-four thousand, six hundred forty-five".