228646791 has 24 divisors (see below), whose sum is σ = 347487504. Its totient is φ = 144685440.

The previous prime is 228646763. The next prime is 228646837. The reversal of 228646791 is 197646822.

It is a happy number.

228646791 is a `hidden beast` number, since 22 + 86 + 467 + 91 = 666.

It is not a de Polignac number, because 228646791 - 2⁹ = 228646279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228646721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5280 + ... + 22026.

It is an arithmetic number, because the mean of its divisors is an integer number (14478646).

Almost surely, 2^228646791 is an apocalyptic number.

228646791 is a deficient number, since it is larger than the sum of its proper divisors (118840713).

228646791 is a wasteful number, since it uses less digits than its factorization.

228646791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16831 (or 16828 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 228646791 is about 15121.0710930145. The cubic root of 228646791 is about 611.4886074611.

The spelling of 228646791 in words is "two hundred twenty-eight million, six hundred forty-six thousand, seven hundred ninety-one".