1871228 has 12 divisors (see below), whose sum is σ = 3284232. Its totient is φ = 932880.

The previous prime is 1871213. The next prime is 1871249. The reversal of 1871228 is 8221781.

It is a self number, because there is not a number n which added to its sum of digits gives 1871228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2363 + ... + 3053.

It is an arithmetic number, because the mean of its divisors is an integer number (273686).

2^1871228 is an apocalyptic number.

It is an amenable number.

1871228 is a deficient number, since it is larger than the sum of its proper divisors (1413004).

1871228 is a wasteful number, since it uses less digits than its factorization.

1871228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1370 counting only the distinct ones).

The product of its digits is 1792, while the sum is 29.

The square root of 1871228 is about 1367.9283606973. The cubic root of 1871228 is about 123.2278588542.

The spelling of 1871228 in words is "one million, eight hundred seventy-one thousand, two hundred twenty-eight".