3857690 has 24 divisors (see below), whose sum is σ = 7187292. Its totient is φ = 1489920.

The previous prime is 3857683. The next prime is 3857717. The reversal of 3857690 is 967583.

It can be written as a sum of positive squares in 6 ways, for example, as 534361 + 3323329 = 731^2 + 1823^2 .

It is a super-2 number, since 2×3857690² = 29763544272200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 39722 + ... + 39818.

Almost surely, 2^3857690 is an apocalyptic number.

3857690 is a deficient number, since it is larger than the sum of its proper divisors (3329602).

3857690 is an equidigital number, since it uses as much as digits as its factorization.

3857690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 3857690 is about 1964.1003029377. The cubic root of 3857690 is about 156.8348026403.

The spelling of 3857690 in words is "three million, eight hundred fifty-seven thousand, six hundred ninety".