400360055 has 4 divisors (see below), whose sum is σ = 480432072. Its totient is φ = 320288040.

The previous prime is 400360049. The next prime is 400360067. The reversal of 400360055 is 550063004.

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

It is not a de Polignac number, because 400360055 - 2⁶ = 400359991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400360055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40036001 + ... + 40036010.

It is an arithmetic number, because the mean of its divisors is an integer number (120108018).

Almost surely, 2^400360055 is an apocalyptic number.

400360055 is a deficient number, since it is larger than the sum of its proper divisors (80072017).

400360055 is an equidigital number, since it uses as much as digits as its factorization.

400360055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80072016.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 400360055 is about 20008.9993502924. Note that the first 3 decimals coincide. The cubic root of 400360055 is about 737.0273090886.

The spelling of 400360055 in words is "four hundred million, three hundred sixty thousand, fifty-five".