819951952 has 10 divisors (see below), whose sum is σ = 1588656938. Its totient is φ = 409975968.

The previous prime is 819951947. The next prime is 819951971. The reversal of 819951952 is 259159918.

It can be written as a sum of positive squares in only one way, i.e., 481539136 + 338412816 = 21944^2 + 18396^2 .

It is a super-2 number, since 2×819951952² = 1344642407177220608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 819951896 and 819951905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25623483 + ... + 25623514.

Almost surely, 2^819951952 is an apocalyptic number.

It is an amenable number.

819951952 is a deficient number, since it is larger than the sum of its proper divisors (768704986).

819951952 is a wasteful number, since it uses less digits than its factorization.

819951952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51247005 (or 51246999 counting only the distinct ones).

The product of its digits is 291600, while the sum is 49.

The square root of 819951952 is about 28634.8031597914. The cubic root of 819951952 is about 935.9718804711.

The spelling of 819951952 in words is "eight hundred nineteen million, nine hundred fifty-one thousand, nine hundred fifty-two".