3781658 has 16 divisors (see below), whose sum is σ = 5930280. Its totient is φ = 1806336.

The previous prime is 3781649. The next prime is 3781663. The reversal of 3781658 is 8561873.

3781658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3323329 + 458329 = 1823^2 + 677^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 6266 + ... + 6842.

Almost surely, 2^3781658 is an apocalyptic number.

3781658 is a deficient number, since it is larger than the sum of its proper divisors (2148622).

3781658 is a wasteful number, since it uses less digits than its factorization.

3781658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721.

The product of its digits is 40320, while the sum is 38.

The square root of 3781658 is about 1944.6485543666. The cubic root of 3781658 is about 155.7975952693.

The spelling of 3781658 in words is "three million, seven hundred eighty-one thousand, six hundred fifty-eight".