400704565 has 4 divisors (see below), whose sum is σ = 480845484. Its totient is φ = 320563648.

The previous prime is 400704541. The next prime is 400704589. The reversal of 400704565 is 565407004.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (400704541) and next prime (400704589).

It can be written as a sum of positive squares in 2 ways, for example, as 250715556 + 149989009 = 15834^2 + 12247^2 .

It is a cyclic number.

It is not a de Polignac number, because 400704565 - 2⁵ = 400704533 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent 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, 40070452 + ... + 40070461.

It is an arithmetic number, because the mean of its divisors is an integer number (120211371).

Almost surely, 2^400704565 is an apocalyptic number.

It is an amenable number.

400704565 is a deficient number, since it is larger than the sum of its proper divisors (80140919).

400704565 is an equidigital number, since it uses as much as digits as its factorization.

400704565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80140918.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 400704565 is about 20017.6063753886. The cubic root of 400704565 is about 737.2386525856.

The spelling of 400704565 in words is "four hundred million, seven hundred four thousand, five hundred sixty-five".