2821203228 has 24 divisors (see below), whose sum is σ = 6606076288. Its totient is φ = 937076976.

The previous prime is 2821203199. The next prime is 2821203263. The reversal of 2821203228 is 8223021282.

It is a junction number, because it is equal to n+sod(n) for n = 2821203195 and 2821203204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411976 + ... + 418767.

Almost surely, 2^2821203228 is an apocalyptic number.

It is an amenable number.

2821203228 is an abundant number, since it is smaller than the sum of its proper divisors (3784873060).

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

2821203228 is a wasteful number, since it uses less digits than its factorization.

2821203228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831033 (or 831031 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 2821203228 is about 53115.0000282406. Note that the first 4 decimals coincide. The cubic root of 2821203228 is about 1413.0085531212.

The spelling of 2821203228 in words is "two billion, eight hundred twenty-one million, two hundred three thousand, two hundred twenty-eight".