2157847228 has 12 divisors (see below), whose sum is σ = 3782520112. Its totient is φ = 1077127200.

The previous prime is 2157847217. The next prime is 2157847249. The reversal of 2157847228 is 8227487512.

It is a happy number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 446400 + ... + 451207.

Almost surely, 2^2157847228 is an apocalyptic number.

It is an amenable number.

2157847228 is a deficient number, since it is larger than the sum of its proper divisors (1624672884).

2157847228 is a wasteful number, since it uses less digits than its factorization.

2157847228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898212 (or 898210 counting only the distinct ones).

The product of its digits is 501760, while the sum is 46.

The square root of 2157847228 is about 46452.6342417736. The cubic root of 2157847228 is about 1292.2312262081.

The spelling of 2157847228 in words is "two billion, one hundred fifty-seven million, eight hundred forty-seven thousand, two hundred twenty-eight".