3784345 has 4 divisors (see below), whose sum is σ = 4541220. Its totient is φ = 3027472.

The previous prime is 3784343. The next prime is 3784357. The reversal of 3784345 is 5434873.

It is a happy number.

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 2611456 + 1172889 = 1616^2 + 1083^2 .

It is a cyclic number.

It is not a de Polignac number, because 3784345 - 2¹ = 3784343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3784345.

It is not an unprimeable number, because it can be changed into a prime (3784343) 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, 378430 + ... + 378439.

It is an arithmetic number, because the mean of its divisors is an integer number (1135305).

Almost surely, 2^3784345 is an apocalyptic number.

It is an amenable number.

3784345 is a deficient number, since it is larger than the sum of its proper divisors (756875).

3784345 is an equidigital number, since it uses as much as digits as its factorization.

3784345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756874.

The product of its digits is 40320, while the sum is 34.

The square root of 3784345 is about 1945.3393020242. The cubic root of 3784345 is about 155.8344864096.

It can be divided in two parts, 37843 and 45, that multiplied together give a triangular number (1702935 = T₁₈₄₅).

The spelling of 3784345 in words is "three million, seven hundred eighty-four thousand, three hundred forty-five".