18670228 has 12 divisors (see below), whose sum is σ = 33087040. Its totient is φ = 9216792.

The previous prime is 18670219. The next prime is 18670247. The reversal of 18670228 is 82207681.

It is a junction number, because it is equal to n+sod(n) for n = 18670193 and 18670202.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 29226 + ... + 29857.

Almost surely, 2^18670228 is an apocalyptic number.

It is an amenable number.

18670228 is a deficient number, since it is larger than the sum of its proper divisors (14416812).

18670228 is a wasteful number, since it uses less digits than its factorization.

18670228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59166 (or 59164 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 18670228 is about 4320.9059235304. The cubic root of 18670228 is about 265.2873493931.

The spelling of 18670228 in words is "eighteen million, six hundred seventy thousand, two hundred twenty-eight".