400366 has 4 divisors (see below), whose sum is σ = 600552. Its totient is φ = 200182.

The previous prime is 400339. The next prime is 400381. The reversal of 400366 is 663004.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100090 + ... + 100093.

It is an arithmetic number, because the mean of its divisors is an integer number (150138).

2⁴⁰⁰³⁶⁶ is an apocalyptic number.

400366 is a deficient number, since it is larger than the sum of its proper divisors (200186).

400366 is a wasteful number, since it uses less digits than its factorization.

400366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200185.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 400366 is about 632.7448142814. The cubic root of 400366 is about 73.7030957143.

The spelling of 400366 in words is "four hundred thousand, three hundred sixty-six".