819685950 has 24 divisors (see below), whose sum is σ = 2032821528. Its totient is φ = 218582880.

The previous prime is 819685949. The next prime is 819685967. The reversal of 819685950 is 59586918.

It is a junction number, because it is equal to n+sod(n) for n = 819685893 and 819685902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2732137 + ... + 2732436.

It is an arithmetic number, because the mean of its divisors is an integer number (84700897).

Almost surely, 2^819685950 is an apocalyptic number.

819685950 is an abundant number, since it is smaller than the sum of its proper divisors (1213135578).

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

819685950 is a wasteful number, since it uses less digits than its factorization.

819685950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464588 (or 5464583 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 51.

The square root of 819685950 is about 28630.1580505592. The cubic root of 819685950 is about 935.8706561171.

The spelling of 819685950 in words is "eight hundred nineteen million, six hundred eighty-five thousand, nine hundred fifty".