814425778 has 4 divisors (see below), whose sum is σ = 1221638670. Its totient is φ = 407212888.

The previous prime is 814425761. The next prime is 814425779. The reversal of 814425778 is 877524418.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 682933689 + 131492089 = 26133^2 + 11467^2 .

It is not an unprimeable number, because it can be changed into a prime (814425779) 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 as a sum of consecutive naturals, namely, 203606443 + ... + 203606446.

Almost surely, 2^814425778 is an apocalyptic number.

814425778 is a deficient number, since it is larger than the sum of its proper divisors (407212892).

814425778 is a wasteful number, since it uses less digits than its factorization.

814425778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407212891.

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

The square root of 814425778 is about 28538.1460154650. The cubic root of 814425778 is about 933.8644370377.

The spelling of 814425778 in words is "eight hundred fourteen million, four hundred twenty-five thousand, seven hundred seventy-eight".