821168446 has 16 divisors (see below), whose sum is σ = 1408111200. Its totient is φ = 351830880.

The previous prime is 821168363. The next prime is 821168461. The reversal of 821168446 is 644861128.

It is a junction number, because it is equal to n+sod(n) for n = 821168399 and 821168408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68080 + ... + 79228.

It is an arithmetic number, because the mean of its divisors is an integer number (88006950).

Almost surely, 2^821168446 is an apocalyptic number.

821168446 is a deficient number, since it is larger than the sum of its proper divisors (586942754).

821168446 is a wasteful number, since it uses less digits than its factorization.

821168446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16419.

The product of its digits is 73728, while the sum is 40.

The square root of 821168446 is about 28656.0368160009. The cubic root of 821168446 is about 936.4345260988.

The spelling of 821168446 in words is "eight hundred twenty-one million, one hundred sixty-eight thousand, four hundred forty-six".