3212816 has 20 divisors (see below), whose sum is σ = 6283452. Its totient is φ = 1591296.

The previous prime is 3212791. The next prime is 3212819. The reversal of 3212816 is 6182123.

It can be written as a sum of positive squares in 2 ways, for example, as 640000 + 2572816 = 800^2 + 1604^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3212791 and 3212800.

It is not an unprimeable number, because it can be changed into a prime (3212819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920 + ... + 2696.

Almost surely, 2^3212816 is an apocalyptic number.

It is an amenable number.

3212816 is a deficient number, since it is larger than the sum of its proper divisors (3070636).

3212816 is a wasteful number, since it uses less digits than its factorization.

3212816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898 (or 1892 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 3212816 is about 1792.4329834055. The cubic root of 3212816 is about 147.5577251795.

Adding to 3212816 its reverse (6182123), we get a palindrome (9394939).

The spelling of 3212816 in words is "three million, two hundred twelve thousand, eight hundred sixteen".