1329228 has 18 divisors (see below), whose sum is σ = 3360084. Its totient is φ = 443064.

The previous prime is 1329217. The next prime is 1329233. The reversal of 1329228 is 8229231.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18426 + ... + 18497.

2^1329228 is an apocalyptic number.

1329228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1329228 is an abundant number, since it is smaller than the sum of its proper divisors (2030856).

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

1329228 is a wasteful number, since it uses less digits than its factorization.

1329228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36933 (or 36928 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1329228 is about 1152.9215064348. The cubic root of 1329228 is about 109.9511628938.

It can be divided in two parts, 13 and 29228, that added together give a square (29241 = 171²).

The spelling of 1329228 in words is "one million, three hundred twenty-nine thousand, two hundred twenty-eight".