1872228 has 12 divisors (see below), whose sum is σ = 4368560. Its totient is φ = 624072.

The previous prime is 1872217. The next prime is 1872229. The reversal of 1872228 is 8222781.

It is a happy number.

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

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 8 + 7⁷ + 2² + 2⁵ + 2²⁰ + 8² .

It is a junction number, because it is equal to n+sod(n) for n = 1872195 and 1872204.

It is not an unprimeable number, because it can be changed into a prime (1872229) 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, 77998 + ... + 78021.

2^1872228 is an apocalyptic number.

It is an amenable number.

1872228 is an abundant number, since it is smaller than the sum of its proper divisors (2496332).

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

1872228 is a wasteful number, since it uses less digits than its factorization.

1872228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156026 (or 156024 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 1872228 is about 1368.2938280940. The cubic root of 1872228 is about 123.2498062802.

It can be divided in two parts, 187 and 2228, that added together give a triangular number (2415 = T₆₉).

The spelling of 1872228 in words is "one million, eight hundred seventy-two thousand, two hundred twenty-eight".