228665722 has 16 divisors (see below), whose sum is σ = 361389600. Its totient is φ = 108213840.

The previous prime is 228665719. The next prime is 228665777. The reversal of 228665722 is 227566822.

It is a happy number.

228665722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 52197 + ... + 56407.

It is an arithmetic number, because the mean of its divisors is an integer number (22586850).

Almost surely, 2^228665722 is an apocalyptic number.

228665722 is a deficient number, since it is larger than the sum of its proper divisors (132723878).

228665722 is a wasteful number, since it uses less digits than its factorization.

228665722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5661.

The product of its digits is 161280, while the sum is 40.

The square root of 228665722 is about 15121.6970608460. The cubic root of 228665722 is about 611.5054832302.

The spelling of 228665722 in words is "two hundred twenty-eight million, six hundred sixty-five thousand, seven hundred twenty-two".