228463649 has 6 divisors (see below), whose sum is σ = 229185270. Its totient is φ = 227744160.

The previous prime is 228463621. The next prime is 228463661. The reversal of 228463649 is 946364822.

It can be written as a sum of positive squares in 3 ways, for example, as 5499025 + 222964624 = 2345^2 + 14932^2 .

It is not a de Polignac number, because 228463649 - 2²⁰ = 227415073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228463679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176597 + ... + 177885.

It is an arithmetic number, because the mean of its divisors is an integer number (38197545).

Almost surely, 2^228463649 is an apocalyptic number.

It is an amenable number.

228463649 is a deficient number, since it is larger than the sum of its proper divisors (721621).

228463649 is an frugal number, since it uses more digits than its factorization.

228463649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131 (or 1710 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 228463649 is about 15115.0140257957. The cubic root of 228463649 is about 611.3253000298.

The spelling of 228463649 in words is "two hundred twenty-eight million, four hundred sixty-three thousand, six hundred forty-nine".