3781685 has 8 divisors (see below), whose sum is σ = 4548480. Its totient is φ = 3018384.

The previous prime is 3781669. The next prime is 3781691. The reversal of 3781685 is 5861873.

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 3781685 - 2⁴ = 3781669 is a prime.

It is a super-2 number, since 2×3781685² = 28602282878450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3656 + ... + 4574.

It is an arithmetic number, because the mean of its divisors is an integer number (568560).

Almost surely, 2^3781685 is an apocalyptic number.

It is an amenable number.

3781685 is a deficient number, since it is larger than the sum of its proper divisors (766795).

3781685 is an equidigital number, since it uses as much as digits as its factorization.

3781685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747.

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

The square root of 3781685 is about 1944.6554964826. The cubic root of 3781685 is about 155.7979660524.

The spelling of 3781685 in words is "three million, seven hundred eighty-one thousand, six hundred eighty-five".