18753228 has 144 divisors (see below), whose sum is σ = 56753760. Its totient is φ = 5318784.

The previous prime is 18753223. The next prime is 18753239. The reversal of 18753228 is 82235781.

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 = 18753192 and 18753201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18753223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 506826 + ... + 506862.

Almost surely, 2^18753228 is an apocalyptic number.

18753228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18753228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28376880).

18753228 is an abundant number, since it is smaller than the sum of its proper divisors (38000532).

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

18753228 is a wasteful number, since it uses less digits than its factorization.

18753228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 74 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18753228 is about 4330.4997402147. The cubic root of 18753228 is about 265.6798870291.

It can be divided in two parts, 18753 and 228, that added together give a palindrome (18981).

The spelling of 18753228 in words is "eighteen million, seven hundred fifty-three thousand, two hundred twenty-eight".