400082 has 4 divisors (see below), whose sum is σ = 600126. Its totient is φ = 200040.

The previous prime is 400069. The next prime is 400087. The reversal of 400082 is 280004.

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., 290521 + 109561 = 539^2 + 331^2 .

400082 is a modest number, since divided by 82 gives 4 as remainder.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400082.

It is not an unprimeable number, because it can be changed into a prime (400087) by changing a digit.

400082 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100019 + ... + 100022.

2⁴⁰⁰⁰⁸² is an apocalyptic number.

400082 is a deficient number, since it is larger than the sum of its proper divisors (200044).

400082 is a wasteful number, since it uses less digits than its factorization.

400082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200043.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 400082 is about 632.5203554037. The cubic root of 400082 is about 73.6856644718.

Adding to 400082 its reverse (280004), we get a palindrome (680086).

The spelling of 400082 in words is "four hundred thousand, eighty-two".