400396 has 12 divisors (see below), whose sum is σ = 723520. Its totient is φ = 193680.

The previous prime is 400391. The next prime is 400409. The reversal of 400396 is 693004.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

400396 is a modest number, since divided by 396 gives 40 as remainder.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (400391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1491 + ... + 1738.

2⁴⁰⁰³⁹⁶ is an apocalyptic number.

It is an amenable number.

400396 is a deficient number, since it is larger than the sum of its proper divisors (323124).

400396 is a wasteful number, since it uses less digits than its factorization.

400396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264 (or 3262 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 400396 is about 632.7685200767. The cubic root of 400396 is about 73.7049365613.

The spelling of 400396 in words is "four hundred thousand, three hundred ninety-six".