3800645 has 4 divisors (see below), whose sum is σ = 4560780. Its totient is φ = 3040512.

The previous prime is 3800633. The next prime is 3800647. The reversal of 3800645 is 5460083.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2307361 + 1493284 = 1519^2 + 1222^2 .

It is a cyclic number.

It is not a de Polignac number, because 3800645 - 2⁶ = 3800581 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3800647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380060 + ... + 380069.

It is an arithmetic number, because the mean of its divisors is an integer number (1140195).

Almost surely, 2^3800645 is an apocalyptic number.

It is an amenable number.

3800645 is a deficient number, since it is larger than the sum of its proper divisors (760135).

3800645 is an equidigital number, since it uses as much as digits as its factorization.

3800645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760134.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 3800645 is about 1949.5243009514. The cubic root of 3800645 is about 156.0579036637.

The spelling of 3800645 in words is "three million, eight hundred thousand, six hundred forty-five".