400835 has 4 divisors (see below), whose sum is σ = 481008. Its totient is φ = 320664.

The previous prime is 400823. The next prime is 400837. The reversal of 400835 is 538004.

400835 is nontrivially palindromic in base 2.

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

It is a cyclic number.

It is not a de Polignac number, because 400835 - 2⁸ = 400579 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (400837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40079 + ... + 40088.

It is an arithmetic number, because the mean of its divisors is an integer number (120252).

2⁴⁰⁰⁸³⁵ is an apocalyptic number.

400835 is a deficient number, since it is larger than the sum of its proper divisors (80173).

400835 is an equidigital number, since it uses as much as digits as its factorization.

400835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80172.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 400835 is about 633.1153133514. The cubic root of 400835 is about 73.7318637775.

Adding to 400835 its reverse (538004), we get a palindrome (938839).

The spelling of 400835 in words is "four hundred thousand, eight hundred thirty-five".