3821690 has 16 divisors (see below), whose sum is σ = 6902280. Its totient is φ = 1523520.

The previous prime is 3821689. The next prime is 3821723. The reversal of 3821690 is 961283.

3821690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2886601 + 935089 = 1699^2 + 967^2 .

It is a super-2 number, since 2×3821690² = 29210628912200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4196 + ... + 5024.

Almost surely, 2^3821690 is an apocalyptic number.

3821690 is a deficient number, since it is larger than the sum of its proper divisors (3080590).

3821690 is a wasteful number, since it uses less digits than its factorization.

3821690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 3821690 is about 1954.9143203731. The cubic root of 3821690 is about 156.3454158547.

The spelling of 3821690 in words is "three million, eight hundred twenty-one thousand, six hundred ninety".