3781394 has 4 divisors (see below), whose sum is σ = 5672094. Its totient is φ = 1890696.

The previous prime is 3781387. The next prime is 3781403. The reversal of 3781394 is 4931873.

3781394 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: 4931873 = 71 ⋅69463.

It can be written as a sum of positive squares in only one way, i.e., 2706025 + 1075369 = 1645^2 + 1037^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 945347 + ... + 945350.

Almost surely, 2^3781394 is an apocalyptic number.

3781394 is a deficient number, since it is larger than the sum of its proper divisors (1890700).

3781394 is a wasteful number, since it uses less digits than its factorization.

3781394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890699.

The product of its digits is 18144, while the sum is 35.

The square root of 3781394 is about 1944.5806745929. The cubic root of 3781394 is about 155.7939697412.

The spelling of 3781394 in words is "three million, seven hundred eighty-one thousand, three hundred ninety-four".