819889480 has 16 divisors (see below), whose sum is σ = 1844751420. Its totient is φ = 327955776.

The previous prime is 819889409. The next prime is 819889523. The reversal of 819889480 is 84988918.

It can be written as a sum of positive squares in 2 ways, for example, as 794225124 + 25664356 = 28182^2 + 5066^2 .

It is an unprimeable number.

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, 10248579 + ... + 10248658.

Almost surely, 2^819889480 is an apocalyptic number.

It is an amenable number.

819889480 is an abundant number, since it is smaller than the sum of its proper divisors (1024861940).

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

819889480 is a wasteful number, since it uses less digits than its factorization.

819889480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20497248 (or 20497244 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 55.

The square root of 819889480 is about 28633.7122986175. The cubic root of 819889480 is about 935.9481093545.

The spelling of 819889480 in words is "eight hundred nineteen million, eight hundred eighty-nine thousand, four hundred eighty".