821868462 has 12 divisors (see below), whose sum is σ = 1780715040. Its totient is φ = 273956148.

The previous prime is 821868419. The next prime is 821868473. The reversal of 821868462 is 264868128.

821868462 is a `hidden beast` number, since 8 + 2 + 186 + 8 + 462 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22829662 + ... + 22829697.

It is an arithmetic number, because the mean of its divisors is an integer number (148392920).

Almost surely, 2^821868462 is an apocalyptic number.

821868462 is an abundant number, since it is smaller than the sum of its proper divisors (958846578).

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

821868462 is a wasteful number, since it uses less digits than its factorization.

821868462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45659367 (or 45659364 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 821868462 is about 28668.2483245838. The cubic root of 821868462 is about 936.7005425594.

The spelling of 821868462 in words is "eight hundred twenty-one million, eight hundred sixty-eight thousand, four hundred sixty-two".