225386778 has 16 divisors (see below), whose sum is σ = 474498720. Its totient is φ = 71174736.

The previous prime is 225386741. The next prime is 225386789. The reversal of 225386778 is 877683522.

225386778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988425 + ... + 988652.

It is an arithmetic number, because the mean of its divisors is an integer number (29656170).

Almost surely, 2^225386778 is an apocalyptic number.

225386778 is an abundant number, since it is smaller than the sum of its proper divisors (249111942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225386778 is a wasteful number, since it uses less digits than its factorization.

225386778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977101.

The product of its digits is 1128960, while the sum is 48.

The square root of 225386778 is about 15012.8870641193. The cubic root of 225386778 is about 608.5685129260.

The spelling of 225386778 in words is "two hundred twenty-five million, three hundred eighty-six thousand, seven hundred seventy-eight".