3785691 has 32 divisors (see below), whose sum is σ = 6361600. Its totient is φ = 1989792.

The previous prime is 3785687. The next prime is 3785753. The reversal of 3785691 is 1965873.

It is not a de Polignac number, because 3785691 - 2² = 3785687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a d-powerful number, because it can be written as 3⁷ + 7² + 8⁷ + 5³ + 6⁸ + 9⁴ + 1 .

It is not an unprimeable number, because it can be changed into a prime (3785641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13236 + ... + 13518.

It is an arithmetic number, because the mean of its divisors is an integer number (198800).

Almost surely, 2^3785691 is an apocalyptic number.

3785691 is a deficient number, since it is larger than the sum of its proper divisors (2575909).

3785691 is a wasteful number, since it uses less digits than its factorization.

3785691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 306 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 3785691 is about 1945.6852263406. The cubic root of 3785691 is about 155.8529597390.

The spelling of 3785691 in words is "three million, seven hundred eighty-five thousand, six hundred ninety-one".