823281128 has 8 divisors (see below), whose sum is σ = 1543652130. Its totient is φ = 411640560.

The previous prime is 823281127. The next prime is 823281131. The reversal of 823281128 is 821182328.

It can be written as a sum of positive squares in only one way, i.e., 765186244 + 58094884 = 27662^2 + 7622^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (823281127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51455063 + ... + 51455078.

Almost surely, 2^823281128 is an apocalyptic number.

It is an amenable number.

823281128 is a deficient number, since it is larger than the sum of its proper divisors (720371002).

823281128 is a wasteful number, since it uses less digits than its factorization.

823281128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102910147 (or 102910143 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 823281128 is about 28692.8759102325. The cubic root of 823281128 is about 937.2369169474.

The spelling of 823281128 in words is "eight hundred twenty-three million, two hundred eighty-one thousand, one hundred twenty-eight".