228770665 has 4 divisors (see below), whose sum is σ = 274524804. Its totient is φ = 183016528.

The previous prime is 228770657. The next prime is 228770681. The reversal of 228770665 is 566077822.

228770665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78659161 + 150111504 = 8869^2 + 12252^2 .

It is a cyclic number.

It is not a de Polignac number, because 228770665 - 2³ = 228770657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22877062 + ... + 22877071.

It is an arithmetic number, because the mean of its divisors is an integer number (68631201).

Almost surely, 2^228770665 is an apocalyptic number.

It is an amenable number.

228770665 is a deficient number, since it is larger than the sum of its proper divisors (45754139).

228770665 is an equidigital number, since it uses as much as digits as its factorization.

228770665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45754138.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 228770665 is about 15125.1666106526. The cubic root of 228770665 is about 611.5990162774.

The spelling of 228770665 in words is "two hundred twenty-eight million, seven hundred seventy thousand, six hundred sixty-five".