400682 has 4 divisors (see below), whose sum is σ = 601026. Its totient is φ = 200340.

The previous prime is 400681. The next prime is 400703. The reversal of 400682 is 286004.

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., 395641 + 5041 = 629^2 + 71^2 .

It is not an unprimeable number, because it can be changed into a prime (400681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100169 + ... + 100172.

2⁴⁰⁰⁶⁸² is an apocalyptic number.

400682 is a deficient number, since it is larger than the sum of its proper divisors (200344).

400682 is a wasteful number, since it uses less digits than its factorization.

400682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200343.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 400682 is about 632.9944707499. The cubic root of 400682 is about 73.7224813543.

Adding to 400682 its reverse (286004), we get a palindrome (686686).

The spelling of 400682 in words is "four hundred thousand, six hundred eighty-two".