228665723 has 16 divisors (see below), whose sum is σ = 269509632. Its totient is φ = 191268000.

The previous prime is 228665719. The next prime is 228665777. The reversal of 228665723 is 327566822.

It is not a de Polignac number, because 228665723 - 2² = 228665719 is a prime.

It is a super-2 number, since 2×228665723² = 104576025750225458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228635723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44918 + ... + 49748.

It is an arithmetic number, because the mean of its divisors is an integer number (16844352).

Almost surely, 2^228665723 is an apocalyptic number.

228665723 is a deficient number, since it is larger than the sum of its proper divisors (40843909).

228665723 is a wasteful number, since it uses less digits than its factorization.

228665723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186.

The product of its digits is 241920, while the sum is 41.

The square root of 228665723 is about 15121.6970939111. The cubic root of 228665723 is about 611.5054841216.

The spelling of 228665723 in words is "two hundred twenty-eight million, six hundred sixty-five thousand, seven hundred twenty-three".