3820645 has 8 divisors (see below), whose sum is σ = 4784256. Its totient is φ = 2923536.

The previous prime is 3820627. The next prime is 3820651. The reversal of 3820645 is 5460283.

3820645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3820645 - 2⁷ = 3820517 is a prime.

It is a Duffinian number.

It is a congruent 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, 16497 + ... + 16726.

It is an arithmetic number, because the mean of its divisors is an integer number (598032).

Almost surely, 2^3820645 is an apocalyptic number.

It is an amenable number.

3820645 is a deficient number, since it is larger than the sum of its proper divisors (963611).

3820645 is a wasteful number, since it uses less digits than its factorization.

3820645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33251.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 3820645 is about 1954.6470269591. The cubic root of 3820645 is about 156.3311642319.

It can be divided in two parts, 3820 and 645, that added together give a triangular number (4465 = T₉₄).

The spelling of 3820645 in words is "three million, eight hundred twenty thousand, six hundred forty-five".