821630232 has 48 divisors (see below), whose sum is σ = 2244963240. Its totient is φ = 271450368.

The previous prime is 821630207. The next prime is 821630263. The reversal of 821630232 is 232036128.

821630232 is a `hidden beast` number, since 8 + 2 + 1 + 630 + 23 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 821630196 and 821630205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42358 + ... + 58629.

Almost surely, 2^821630232 is an apocalyptic number.

It is an amenable number.

821630232 is an abundant number, since it is smaller than the sum of its proper divisors (1423333008).

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

821630232 is a wasteful number, since it uses less digits than its factorization.

821630232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101112 (or 101105 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 821630232 is about 28664.0930782748. The cubic root of 821630232 is about 936.6100285883.

The spelling of 821630232 in words is "eight hundred twenty-one million, six hundred thirty thousand, two hundred thirty-two".