400355 has 4 divisors (see below), whose sum is σ = 480432. Its totient is φ = 320280.

The previous prime is 400339. The next prime is 400381. The reversal of 400355 is 553004.

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

It is not a de Polignac number, because 400355 - 2⁴ = 400339 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400355.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40031 + ... + 40040.

It is an arithmetic number, because the mean of its divisors is an integer number (120108).

2⁴⁰⁰³⁵⁵ is an apocalyptic number.

400355 is a deficient number, since it is larger than the sum of its proper divisors (80077).

400355 is an equidigital number, since it uses as much as digits as its factorization.

400355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80076.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 400355 is about 632.7361219339. The cubic root of 400355 is about 73.7024207140.

Adding to 400355 its reverse (553004), we get a palindrome (953359).

The spelling of 400355 in words is "four hundred thousand, three hundred fifty-five".