852686378 has 4 divisors (see below), whose sum is σ = 1279029570. Its totient is φ = 426343188.

The previous prime is 852686377. The next prime is 852686381. The reversal of 852686378 is 873686258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873686258 = 2 ⋅436843129.

It can be written as a sum of positive squares in only one way, i.e., 514972249 + 337714129 = 22693^2 + 18377^2 .

It is not an unprimeable number, because it can be changed into a prime (852686371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213171593 + ... + 213171596.

Almost surely, 2^852686378 is an apocalyptic number.

852686378 is a deficient number, since it is larger than the sum of its proper divisors (426343192).

852686378 is a wasteful number, since it uses less digits than its factorization.

852686378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426343191.

The product of its digits is 3870720, while the sum is 53.

The square root of 852686378 is about 29200.7941330369. The cubic root of 852686378 is about 948.2651173559.

The spelling of 852686378 in words is "eight hundred fifty-two million, six hundred eighty-six thousand, three hundred seventy-eight".