1578228 has 12 divisors (see below), whose sum is σ = 3682560. Its totient is φ = 526072.

The previous prime is 1578221. The next prime is 1578257. The reversal of 1578228 is 8228751.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1578221) 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, 65748 + ... + 65771.

It is an arithmetic number, because the mean of its divisors is an integer number (306880).

2^1578228 is an apocalyptic number.

It is an amenable number.

1578228 is an abundant number, since it is smaller than the sum of its proper divisors (2104332).

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

1578228 is a wasteful number, since it uses less digits than its factorization.

1578228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131526 (or 131524 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 1578228 is about 1256.2754475035. The cubic root of 1578228 is about 116.4277705613.

It can be divided in two parts, 157 and 8228, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 1578228 in words is "one million, five hundred seventy-eight thousand, two hundred twenty-eight".