3478385 has 4 divisors (see below), whose sum is σ = 4174068. Its totient is φ = 2782704.

The previous prime is 3478381. The next prime is 3478411. The reversal of 3478385 is 5838743.

It is a happy number.

3478385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5838743 = 1303 ⋅4481.

It can be written as a sum of positive squares in 2 ways, for example, as 2745649 + 732736 = 1657^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 3478385 - 2² = 3478381 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3478381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347834 + ... + 347843.

It is an arithmetic number, because the mean of its divisors is an integer number (1043517).

Almost surely, 2^3478385 is an apocalyptic number.

It is an amenable number.

3478385 is a deficient number, since it is larger than the sum of its proper divisors (695683).

3478385 is an equidigital number, since it uses as much as digits as its factorization.

3478385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695682.

The product of its digits is 80640, while the sum is 38.

The square root of 3478385 is about 1865.0428949491. The cubic root of 3478385 is about 151.5162512021.

The spelling of 3478385 in words is "three million, four hundred seventy-eight thousand, three hundred eighty-five".