412821812 has 48 divisors (see below), whose sum is σ = 826377552. Its totient is φ = 178759680.

The previous prime is 412821811. The next prime is 412821817. The reversal of 412821812 is 218128214.

It can be written as a sum of positive squares in 8 ways, for example, as 98327056 + 314494756 = 9916^2 + 17734^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412821811) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 407018 + ... + 408030.

It is an arithmetic number, because the mean of its divisors is an integer number (17216199).

Almost surely, 2^412821812 is an apocalyptic number.

It is an amenable number.

412821812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

412821812 is a wasteful number, since it uses less digits than its factorization.

412821812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508 (or 1506 counting only the distinct ones).

The product of its digits is 2048, while the sum is 29.

The square root of 412821812 is about 20318.0169307932. The cubic root of 412821812 is about 744.5963081749.

The spelling of 412821812 in words is "four hundred twelve million, eight hundred twenty-one thousand, eight hundred twelve".