400287225 has 24 divisors (see below), whose sum is σ = 712718272. Its totient is φ = 197064000.

The previous prime is 400287197. The next prime is 400287241. The reversal of 400287225 is 522782004.

It is not a de Polignac number, because 400287225 - 2¹¹ = 400285177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400287192 and 400287201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204301 + ... + 206250.

Almost surely, 2^400287225 is an apocalyptic number.

It is an amenable number.

400287225 is a deficient number, since it is larger than the sum of its proper divisors (312431047).

400287225 is a wasteful number, since it uses less digits than its factorization.

400287225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410577 (or 410572 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 400287225 is about 20007.1793364282. The cubic root of 400287225 is about 736.9826151908.

The spelling of 400287225 in words is "four hundred million, two hundred eighty-seven thousand, two hundred twenty-five".