400755 has 8 divisors (see below), whose sum is σ = 641232. Its totient is φ = 213728.

The previous prime is 400753. The next prime is 400759. The reversal of 400755 is 557004.

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 400755 - 2¹ = 400753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400753) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13344 + ... + 13373.

It is an arithmetic number, because the mean of its divisors is an integer number (80154).

2⁴⁰⁰⁷⁵⁵ is an apocalyptic number.

400755 is a deficient number, since it is larger than the sum of its proper divisors (240477).

400755 is a wasteful number, since it uses less digits than its factorization.

400755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26725.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 400755 is about 633.0521305548. The cubic root of 400755 is about 73.7269582332.

Adding to 400755 its reverse (557004), we get a palindrome (957759).

The spelling of 400755 in words is "four hundred thousand, seven hundred fifty-five".