400253305 has 4 divisors (see below), whose sum is σ = 480303972. Its totient is φ = 320202640.

The previous prime is 400253281. The next prime is 400253311. The reversal of 400253305 is 503352004.

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 313148416 + 87104889 = 17696^2 + 9333^2 .

It is not a de Polignac number, because 400253305 - 2⁷ = 400253177 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, 40025326 + ... + 40025335.

It is an arithmetic number, because the mean of its divisors is an integer number (120075993).

Almost surely, 2^400253305 is an apocalyptic number.

It is an amenable number.

400253305 is a deficient number, since it is larger than the sum of its proper divisors (80050667).

400253305 is an equidigital number, since it uses as much as digits as its factorization.

400253305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80050666.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 400253305 is about 20006.3316227638. The cubic root of 400253305 is about 736.9617975089.

The spelling of 400253305 in words is "four hundred million, two hundred fifty-three thousand, three hundred five".