819951896 has 16 divisors (see below), whose sum is σ = 1560357240. Its totient is φ = 403856640.

The previous prime is 819951893. The next prime is 819951919. The reversal of 819951896 is 698159918.

It is a super-2 number, since 2×819951896² = 1344642223507989632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819951893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764345 + ... + 765416.

Almost surely, 2^819951896 is an apocalyptic number.

It is an amenable number.

819951896 is a deficient number, since it is larger than the sum of its proper divisors (740405344).

819951896 is a wasteful number, since it uses less digits than its factorization.

819951896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529834 (or 1529830 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 56.

The square root of 819951896 is about 28634.8021819603. The cubic root of 819951896 is about 935.9718591632.

The spelling of 819951896 in words is "eight hundred nineteen million, nine hundred fifty-one thousand, eight hundred ninety-six".