400655 has 8 divisors (see below), whose sum is σ = 484272. Its totient is φ = 318208.

The previous prime is 400651. The next prime is 400657. The reversal of 400655 is 556004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400655 - 2² = 400651 is a prime.

It is a super-3 number, since 3×400655³ = 192944745333034125, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400655.

It is not an unprimeable number, because it can be changed into a prime (400651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959 + ... + 1311.

It is an arithmetic number, because the mean of its divisors is an integer number (60534).

2⁴⁰⁰⁶⁵⁵ is an apocalyptic number.

400655 is a deficient number, since it is larger than the sum of its proper divisors (83617).

400655 is a wasteful number, since it uses less digits than its factorization.

400655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 400655 is about 632.9731431901. The cubic root of 400655 is about 73.7208253846.

Adding to 400655 its reverse (556004), we get a palindrome (956659).

The spelling of 400655 in words is "four hundred thousand, six hundred fifty-five".