400375055 has 4 divisors (see below), whose sum is σ = 480450072. Its totient is φ = 320300040.

The previous prime is 400375051. The next prime is 400375057. The reversal of 400375055 is 550573004.

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

It is not a de Polignac number, because 400375055 - 2² = 400375051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400375051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40037501 + ... + 40037510.

It is an arithmetic number, because the mean of its divisors is an integer number (120112518).

Almost surely, 2^400375055 is an apocalyptic number.

400375055 is a deficient number, since it is larger than the sum of its proper divisors (80075017).

400375055 is an equidigital number, since it uses as much as digits as its factorization.

400375055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80075016.

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 400375055 is about 20009.3741781196. The cubic root of 400375055 is about 737.0365135297.

The spelling of 400375055 in words is "four hundred million, three hundred seventy-five thousand, fifty-five".