854212778 has 16 divisors (see below), whose sum is σ = 1369642176. Its totient is φ = 398571360.

The previous prime is 854212771. The next prime is 854212817. The reversal of 854212778 is 877212458.

It is not an unprimeable number, because it can be changed into a prime (854212771) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 224576 + ... + 228347.

It is an arithmetic number, because the mean of its divisors is an integer number (85602636).

Almost surely, 2^854212778 is an apocalyptic number.

854212778 is a deficient number, since it is larger than the sum of its proper divisors (515429398).

854212778 is a wasteful number, since it uses less digits than its factorization.

854212778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452989.

The product of its digits is 250880, while the sum is 44.

The square root of 854212778 is about 29226.9187223012. The cubic root of 854212778 is about 948.8306121201.

The spelling of 854212778 in words is "eight hundred fifty-four million, two hundred twelve thousand, seven hundred seventy-eight".