3820845 has 16 divisors (see below), whose sum is σ = 6986880. Its totient is φ = 1746624.

The previous prime is 3820841. The next prime is 3820847. The reversal of 3820845 is 5480283.

3820845 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 3820845 - 2² = 3820841 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18090 + ... + 18299.

It is an arithmetic number, because the mean of its divisors is an integer number (436680).

Almost surely, 2^3820845 is an apocalyptic number.

3820845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3820845 is a deficient number, since it is larger than the sum of its proper divisors (3166035).

3820845 is a wasteful number, since it uses less digits than its factorization.

3820845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36404.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 3820845 is about 1954.6981864216. The cubic root of 3820845 is about 156.3338920162. Note that the first 3 decimals are identical.

The spelling of 3820845 in words is "three million, eight hundred twenty thousand, eight hundred forty-five".