1791228 has 12 divisors (see below), whose sum is σ = 4179560. Its totient is φ = 597072.

The previous prime is 1791221. The next prime is 1791247. The reversal of 1791228 is 8221971.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1791195 and 1791204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74623 + ... + 74646.

2^1791228 is an apocalyptic number.

It is an amenable number.

1791228 is an abundant number, since it is smaller than the sum of its proper divisors (2388332).

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

1791228 is a wasteful number, since it uses less digits than its factorization.

1791228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149276 (or 149274 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 1791228 is about 1338.3676624904. The cubic root of 1791228 is about 121.4461140580.

The spelling of 1791228 in words is "one million, seven hundred ninety-one thousand, two hundred twenty-eight".