228608465 has 8 divisors (see below), whose sum is σ = 276172200. Its totient is φ = 181658752.

The previous prime is 228608449. The next prime is 228608483. The reversal of 228608465 is 564806822.

It can be written as a sum of positive squares in 4 ways, for example, as 14776336 + 213832129 = 3844^2 + 14623^2 .

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 228608465 - 2⁴ = 228608449 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, 152684 + ... + 154173.

It is an arithmetic number, because the mean of its divisors is an integer number (34521525).

Almost surely, 2^228608465 is an apocalyptic number.

It is an amenable number.

228608465 is a deficient number, since it is larger than the sum of its proper divisors (47563735).

228608465 is a wasteful number, since it uses less digits than its factorization.

228608465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307011.

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 228608465 is about 15119.8037354987. The cubic root of 228608465 is about 611.4544394447.

The spelling of 228608465 in words is "two hundred twenty-eight million, six hundred eight thousand, four hundred sixty-five".