17997228 has 30 divisors (see below), whose sum is σ = 47049156. Its totient is φ = 5998968.

The previous prime is 17997223. The next prime is 17997229. The reversal of 17997228 is 82279971.

It is not an unprimeable number, because it can be changed into a prime (17997223) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27450 + ... + 28097.

Almost surely, 2^17997228 is an apocalyptic number.

17997228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

17997228 is an abundant number, since it is smaller than the sum of its proper divisors (29051928).

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

17997228 is a wasteful number, since it uses less digits than its factorization.

17997228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55563 (or 55552 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 17997228 is about 4242.3139912081. The cubic root of 17997228 is about 262.0606855911.

It can be divided in two parts, 17997 and 228, that added together give a square (18225 = 135²).

The spelling of 17997228 in words is "seventeen million, nine hundred ninety-seven thousand, two hundred twenty-eight".