823251228 has 48 divisors (see below), whose sum is σ = 2024736000. Its totient is φ = 259625088.

The previous prime is 823251227. The next prime is 823251257. The reversal of 823251228 is 822152328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823251227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207568 + ... + 211496.

It is an arithmetic number, because the mean of its divisors is an integer number (42182000).

Almost surely, 2^823251228 is an apocalyptic number.

It is an amenable number.

823251228 is an abundant number, since it is smaller than the sum of its proper divisors (1201484772).

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

823251228 is a wasteful number, since it uses less digits than its factorization.

823251228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874 (or 4872 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 823251228 is about 28692.3548702437. The cubic root of 823251228 is about 937.2255705911.

The spelling of 823251228 in words is "eight hundred twenty-three million, two hundred fifty-one thousand, two hundred twenty-eight".