228657665 has 8 divisors (see below), whose sum is σ = 274992360. Its totient is φ = 182524032.

The previous prime is 228657659. The next prime is 228657691. The reversal of 228657665 is 566756822.

It can be written as a sum of positive squares in 4 ways, for example, as 99062209 + 129595456 = 9953^2 + 11384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228657665 - 2⁸ = 228657409 is a prime.

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, 47750 + ... + 52319.

It is an arithmetic number, because the mean of its divisors is an integer number (34374045).

Almost surely, 2^228657665 is an apocalyptic number.

It is an amenable number.

228657665 is a deficient number, since it is larger than the sum of its proper divisors (46334695).

228657665 is a wasteful number, since it uses less digits than its factorization.

228657665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100531.

The product of its digits is 1209600, while the sum is 47.

The square root of 228657665 is about 15121.4306532153. The cubic root of 228657665 is about 611.4983010467.

The spelling of 228657665 in words is "two hundred twenty-eight million, six hundred fifty-seven thousand, six hundred sixty-five".