400966 has 4 divisors (see below), whose sum is σ = 601452. Its totient is φ = 200482.

The previous prime is 400963. The next prime is 400997. The reversal of 400966 is 669004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 400966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100240 + ... + 100243.

It is an arithmetic number, because the mean of its divisors is an integer number (150363).

2⁴⁰⁰⁹⁶⁶ is an apocalyptic number.

400966 is a deficient number, since it is larger than the sum of its proper divisors (200486).

400966 is a wasteful number, since it uses less digits than its factorization.

400966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200485.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 400966 is about 633.2187615666. The cubic root of 400966 is about 73.7398951970.

The spelling of 400966 in words is "four hundred thousand, nine hundred sixty-six".