7866872238 has 32 divisors (see below), whose sum is σ = 15790775040. Its totient is φ = 2612805120.

The previous prime is 7866872227. The next prime is 7866872239. The reversal of 7866872238 is 8322786687.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7866872239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2141143 + ... + 2144813.

It is an arithmetic number, because the mean of its divisors is an integer number (493461720).

Almost surely, 2^7866872238 is an apocalyptic number.

7866872238 is an abundant number, since it is smaller than the sum of its proper divisors (7923902802).

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

7866872238 is a wasteful number, since it uses less digits than its factorization.

7866872238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4872.

The product of its digits is 10838016, while the sum is 57.

The square root of 7866872238 is about 88695.3901733343. The cubic root of 7866872238 is about 1988.8439063261.

The spelling of 7866872238 in words is "seven billion, eight hundred sixty-six million, eight hundred seventy-two thousand, two hundred thirty-eight".