17990228 has 12 divisors (see below), whose sum is σ = 31516212. Its totient is φ = 8985600.

The previous prime is 17990227. The next prime is 17990239. The reversal of 17990228 is 82209971.

It can be written as a sum of positive squares in 2 ways, for example, as 114244 + 17875984 = 338^2 + 4228^2 .

It is a junction number, because it is equal to n+sod(n) for n = 17990191 and 17990200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17990227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3476 + ... + 6932.

It is an arithmetic number, because the mean of its divisors is an integer number (2626351).

Almost surely, 2^17990228 is an apocalyptic number.

It is an amenable number.

17990228 is a deficient number, since it is larger than the sum of its proper divisors (13525984).

17990228 is a wasteful number, since it uses less digits than its factorization.

17990228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762 (or 4760 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 17990228 is about 4241.4888895292. The cubic root of 17990228 is about 262.0267051232.

The spelling of 17990228 in words is "seventeen million, nine hundred ninety thousand, two hundred twenty-eight".