3691885 has 8 divisors (see below), whose sum is σ = 4450680. Its totient is φ = 2939904.

The previous prime is 3691859. The next prime is 3691913. The reversal of 3691885 is 5881963.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 412164 + 3279721 = 642^2 + 1811^2 .

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 3691885 - 2¹⁹ = 3167597 is a prime.

It is an Ulam number.

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, 420 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (556335).

Almost surely, 2^3691885 is an apocalyptic number.

It is an amenable number.

3691885 is a deficient number, since it is larger than the sum of its proper divisors (758795).

3691885 is a wasteful number, since it uses less digits than its factorization.

3691885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407.

The product of its digits is 51840, while the sum is 40.

The square root of 3691885 is about 1921.4278544874. The cubic root of 3691885 is about 154.5548797335.

The spelling of 3691885 in words is "three million, six hundred ninety-one thousand, eight hundred eighty-five".