400228 has 6 divisors (see below), whose sum is σ = 700406. Its totient is φ = 200112.

The previous prime is 400217. The next prime is 400237. The reversal of 400228 is 822004.

It can be written as a sum of positive squares in only one way, i.e., 338724 + 61504 = 582^2 + 248^2 .

It is an unprimeable number.

400228 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, 50025 + ... + 50032.

2⁴⁰⁰²²⁸ is an apocalyptic number.

It is an amenable number.

400228 is a deficient number, since it is larger than the sum of its proper divisors (300178).

400228 is a wasteful number, since it uses less digits than its factorization.

400228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100061 (or 100059 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400228 is about 632.6357561820. The cubic root of 400228 is about 73.6946266335.

The spelling of 400228 in words is "four hundred thousand, two hundred twenty-eight".