3784505 has 8 divisors (see below), whose sum is σ = 4652424. Its totient is φ = 2953600.

The previous prime is 3784499. The next prime is 3784507. The reversal of 3784505 is 5054873.

3784505 = T₄₀₉ + T₄₁₀ + ... + T₄₄₉.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 219961 + 3564544 = 469^2 + 1888^2 .

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

It is not a de Polignac number, because 3784505 - 2⁶ = 3784441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3784507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9026 + ... + 9435.

It is an arithmetic number, because the mean of its divisors is an integer number (581553).

Almost surely, 2^3784505 is an apocalyptic number.

It is an amenable number.

3784505 is a deficient number, since it is larger than the sum of its proper divisors (867919).

3784505 is a wasteful number, since it uses less digits than its factorization.

3784505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18507.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 3784505 is about 1945.3804255209. The cubic root of 3784505 is about 155.8366825771.

The spelling of 3784505 in words is "three million, seven hundred eighty-four thousand, five hundred five".