228297856 has 16 divisors (see below), whose sum is σ = 454812390. Its totient is φ = 114148864.

The previous prime is 228297833. The next prime is 228297869. The reversal of 228297856 is 658792822.

It is a happy number.

228297856 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 only one way, i.e., 225000000 + 3297856 = 15000^2 + 1816^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×228297856² = 104239822108393472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891661 + ... + 891916.

Almost surely, 2^228297856 is an apocalyptic number.

It is an amenable number.

228297856 is a deficient number, since it is larger than the sum of its proper divisors (226514534).

228297856 is an equidigital number, since it uses as much as digits as its factorization.

228297856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783591 (or 1783579 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 228297856 is about 15109.5286491671. The cubic root of 228297856 is about 611.1773873929.

The spelling of 228297856 in words is "two hundred twenty-eight million, two hundred ninety-seven thousand, eight hundred fifty-six".