228688244 has 6 divisors (see below), whose sum is σ = 400204434. Its totient is φ = 114344120.

The previous prime is 228688223. The next prime is 228688247. The reversal of 228688244 is 442886822.

It can be written as a sum of positive squares in only one way, i.e., 120736144 + 107952100 = 10988^2 + 10390^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228688195 and 228688204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228688247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28586027 + ... + 28586034.

It is an arithmetic number, because the mean of its divisors is an integer number (66700739).

Almost surely, 2^228688244 is an apocalyptic number.

It is an amenable number.

228688244 is a deficient number, since it is larger than the sum of its proper divisors (171516190).

228688244 is a wasteful number, since it uses less digits than its factorization.

228688244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57172065 (or 57172063 counting only the distinct ones).

The product of its digits is 393216, while the sum is 44.

The square root of 228688244 is about 15122.4417340587. The cubic root of 228688244 is about 611.5255589318.

The spelling of 228688244 in words is "two hundred twenty-eight million, six hundred eighty-eight thousand, two hundred forty-four".