400450 has 12 divisors (see below), whose sum is σ = 744930. Its totient is φ = 160160.

The previous prime is 400441. The next prime is 400457. The reversal of 400450 is 54004.

400450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 321489 + 78961 = 567^2 + 281^2 .

It is an Ulam number.

400450 is a modest number, since divided by 450 gives 400 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 400450.

It is not an unprimeable number, because it can be changed into a prime (400457) 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 5 ways as a sum of consecutive naturals, for example, 3955 + ... + 4054.

2⁴⁰⁰⁴⁵⁰ is an apocalyptic number.

400450 is a deficient number, since it is larger than the sum of its proper divisors (344480).

400450 is a wasteful number, since it uses less digits than its factorization.

400450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8021 (or 8016 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 400450 is about 632.8111882702. The cubic root of 400450 is about 73.7082498542.

Adding to 400450 its reverse (54004), we get a palindrome (454454).

The spelling of 400450 in words is "four hundred thousand, four hundred fifty".