400594 has 4 divisors (see below), whose sum is σ = 600894. Its totient is φ = 200296.

The previous prime is 400579. The next prime is 400597. The reversal of 400594 is 495004.

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

It can be written as a sum of positive squares in only one way, i.e., 288369 + 112225 = 537^2 + 335^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (400597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100147 + ... + 100150.

2⁴⁰⁰⁵⁹⁴ is an apocalyptic number.

400594 is a deficient number, since it is larger than the sum of its proper divisors (200300).

400594 is a wasteful number, since it uses less digits than its factorization.

400594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200299.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 400594 is about 632.9249560572. The cubic root of 400594 is about 73.7170838459.

Adding to 400594 its reverse (495004), we get a palindrome (895598).

The spelling of 400594 in words is "four hundred thousand, five hundred ninety-four".