3994820 has 12 divisors (see below), whose sum is σ = 8389164. Its totient is φ = 1597920.

The previous prime is 3994817. The next prime is 3994841. The reversal of 3994820 is 284993.

It can be written as a sum of positive squares in 2 ways, for example, as 1915456 + 2079364 = 1384^2 + 1442^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99851 + ... + 99890.

It is an arithmetic number, because the mean of its divisors is an integer number (699097).

Almost surely, 2^3994820 is an apocalyptic number.

It is an amenable number.

3994820 is an abundant number, since it is smaller than the sum of its proper divisors (4394344).

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

3994820 is a wasteful number, since it uses less digits than its factorization.

3994820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199750 (or 199748 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 3994820 is about 1998.7045804721. The cubic root of 3994820 is about 158.6715527844.

The spelling of 3994820 in words is "three million, nine hundred ninety-four thousand, eight hundred twenty".