815822426 has 8 divisors (see below), whose sum is σ = 1225778400. Its totient is φ = 407229628.

The previous prime is 815822419. The next prime is 815822429. The reversal of 815822426 is 624228518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 815822426.

It is not an unprimeable number, because it can be changed into a prime (815822429) 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 3 ways as a sum of consecutive naturals, for example, 339296 + ... + 341691.

It is an arithmetic number, because the mean of its divisors is an integer number (153222300).

Almost surely, 2^815822426 is an apocalyptic number.

815822426 is a deficient number, since it is larger than the sum of its proper divisors (409955974).

815822426 is a wasteful number, since it uses less digits than its factorization.

815822426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681588.

The product of its digits is 61440, while the sum is 38.

The square root of 815822426 is about 28562.6053783614. The cubic root of 815822426 is about 934.3979561046.

The spelling of 815822426 in words is "eight hundred fifteen million, eight hundred twenty-two thousand, four hundred twenty-six".