400893 has 4 divisors (see below), whose sum is σ = 534528. Its totient is φ = 267260.

The previous prime is 400871. The next prime is 400903. The reversal of 400893 is 398004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400893 - 2⁹ = 400381 is a prime.

It is a D-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 400893.

It is not an unprimeable number, because it can be changed into a prime (400823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66813 + ... + 66818.

It is an arithmetic number, because the mean of its divisors is an integer number (133632).

2⁴⁰⁰⁸⁹³ is an apocalyptic number.

It is an amenable number.

400893 is a deficient number, since it is larger than the sum of its proper divisors (133635).

400893 is a wasteful number, since it uses less digits than its factorization.

400893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133634.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 400893 is about 633.1611169363. The cubic root of 400893 is about 73.7354198890.

Adding to 400893 its reverse (398004), we get a palindrome (798897).

The spelling of 400893 in words is "four hundred thousand, eight hundred ninety-three".