7857856228 has 12 divisors (see below), whose sum is σ = 13754057212. Its totient is φ = 3928125600.

The previous prime is 7857856207. The next prime is 7857856243. The reversal of 7857856228 is 8226587587.

It can be written as a sum of positive squares in 2 ways, for example, as 6180789924 + 1677066304 = 78618^2 + 40952^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178323 + ... + 217978.

Almost surely, 2^7857856228 is an apocalyptic number.

It is an amenable number.

7857856228 is a deficient number, since it is larger than the sum of its proper divisors (5896200984).

7857856228 is a wasteful number, since it uses less digits than its factorization.

7857856228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401262 (or 401260 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 58.

The square root of 7857856228 is about 88644.5499057895. The cubic root of 7857856228 is about 1988.0838291055.

The spelling of 7857856228 in words is "seven billion, eight hundred fifty-seven million, eight hundred fifty-six thousand, two hundred twenty-eight".