18825228 has 36 divisors (see below), whose sum is σ = 48696648. Its totient is φ = 6128640.

The previous prime is 18825227. The next prime is 18825241. The reversal of 18825228 is 82252881.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18825192 and 18825201.

It is not an unprimeable number, because it can be changed into a prime (18825221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4533 + ... + 7628.

Almost surely, 2^18825228 is an apocalyptic number.

18825228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18825228 is an abundant number, since it is smaller than the sum of its proper divisors (29871420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18825228 is a wasteful number, since it uses less digits than its factorization.

18825228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12214 (or 12209 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 18825228 is about 4338.8049045791. The cubic root of 18825228 is about 266.0194645338.

The spelling of 18825228 in words is "eighteen million, eight hundred twenty-five thousand, two hundred twenty-eight".