821828452 has 12 divisors (see below), whose sum is σ = 1457901676. Its totient is φ = 405285120.

The previous prime is 821828437. The next prime is 821828473. The reversal of 821828452 is 254828128.

821828452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 232989696 + 588838756 = 15264^2 + 24266^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406949 + ... + 1407532.

Almost surely, 2^821828452 is an apocalyptic number.

It is an amenable number.

821828452 is a deficient number, since it is larger than the sum of its proper divisors (636073224).

821828452 is a wasteful number, since it uses less digits than its factorization.

821828452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814558 (or 2814556 counting only the distinct ones).

The product of its digits is 81920, while the sum is 40.

The square root of 821828452 is about 28667.5505057548. The cubic root of 821828452 is about 936.6853422370.

The spelling of 821828452 in words is "eight hundred twenty-one million, eight hundred twenty-eight thousand, four hundred fifty-two".