23278228 has 6 divisors (see below), whose sum is σ = 40736906. Its totient is φ = 11639112.

The previous prime is 23278223. The next prime is 23278243. The reversal of 23278228 is 82287232.

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 219024 = 4802^2 + 468^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23278193 and 23278202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2909775 + ... + 2909782.

Almost surely, 2^23278228 is an apocalyptic number.

It is an amenable number.

23278228 is a deficient number, since it is larger than the sum of its proper divisors (17458678).

23278228 is a wasteful number, since it uses less digits than its factorization.

23278228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5819561 (or 5819559 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 23278228 is about 4824.7515998236. The cubic root of 23278228 is about 285.5288344630.

The spelling of 23278228 in words is "twenty-three million, two hundred seventy-eight thousand, two hundred twenty-eight".