3785405 has 8 divisors (see below), whose sum is σ = 4891992. Its totient is φ = 2795328.

The previous prime is 3785401. The next prime is 3785417. The reversal of 3785405 is 5045873.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 273529 + 3511876 = 523^2 + 1874^2 .

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 3785405 - 2² = 3785401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3785401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29054 + ... + 29183.

It is an arithmetic number, because the mean of its divisors is an integer number (611499).

Almost surely, 2^3785405 is an apocalyptic number.

It is an amenable number.

3785405 is a deficient number, since it is larger than the sum of its proper divisors (1106587).

3785405 is a wasteful number, since it uses less digits than its factorization.

3785405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58255.

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

The square root of 3785405 is about 1945.6117289943. The cubic root of 3785405 is about 155.8490348660.

The spelling of 3785405 in words is "three million, seven hundred eighty-five thousand, four hundred five".