1647228 has 24 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 499120.

The previous prime is 1647227. The next prime is 1647241. The reversal of 1647228 is 8227461.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1647195 and 1647204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1647227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6108 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (174720).

2^1647228 is an apocalyptic number.

It is an amenable number.

1647228 is an abundant number, since it is smaller than the sum of its proper divisors (2546052).

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

1647228 is a wasteful number, since it uses less digits than its factorization.

1647228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12497 (or 12495 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 1647228 is about 1283.4438047690. The cubic root of 1647228 is about 118.1003646731.

The spelling of 1647228 in words is "one million, six hundred forty-seven thousand, two hundred twenty-eight".