11661228 has 18 divisors (see below), whose sum is σ = 29477084. Its totient is φ = 3887064.

The previous prime is 11661197. The next prime is 11661229. The reversal of 11661228 is 82216611.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11661229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161926 + ... + 161997.

Almost surely, 2^11661228 is an apocalyptic number.

11661228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11661228 is an abundant number, since it is smaller than the sum of its proper divisors (17815856).

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

11661228 is a wasteful number, since it uses less digits than its factorization.

11661228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323933 (or 323928 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 11661228 is about 3414.8540232344. The cubic root of 11661228 is about 226.7678220168.

Adding to 11661228 its reverse (82216611), we get a palindrome (93877839).

The spelling of 11661228 in words is "eleven million, six hundred sixty-one thousand, two hundred twenty-eight".