821766030 has 16 divisors (see below), whose sum is σ = 1972238544. Its totient is φ = 219137600.

The previous prime is 821765963. The next prime is 821766031. The reversal of 821766030 is 30667128.

It is a junction number, because it is equal to n+sod(n) for n = 821765982 and 821766000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821766031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13696071 + ... + 13696130.

It is an arithmetic number, because the mean of its divisors is an integer number (123264909).

Almost surely, 2^821766030 is an apocalyptic number.

821766030 is an abundant number, since it is smaller than the sum of its proper divisors (1150472514).

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

821766030 is a wasteful number, since it uses less digits than its factorization.

821766030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27392211.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 821766030 is about 28666.4617628336. The cubic root of 821766030 is about 936.6616263172.

It can be divided in two parts, 8217 and 66030, that added together give a palindrome (74247).

The spelling of 821766030 in words is "eight hundred twenty-one million, seven hundred sixty-six thousand, thirty".