3691845 has 64 divisors (see below), whose sum is σ = 7257600. Its totient is φ = 1774080.

The previous prime is 3691843. The next prime is 3691847. The reversal of 3691845 is 5481963.

It is an interprime number because it is at equal distance from previous prime (3691843) and next prime (3691847).

It is not a de Polignac number, because 3691845 - 2¹ = 3691843 is a prime.

3691845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3691841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90025 + ... + 90065.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

Almost surely, 2^3691845 is an apocalyptic number.

It is an amenable number.

3691845 is a deficient number, since it is larger than the sum of its proper divisors (3565755).

3691845 is a wasteful number, since it uses less digits than its factorization.

3691845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 101 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3691845 is about 1921.4174455334. The cubic root of 3691845 is about 154.5543215527.

It can be divided in two parts, 36918 and 45, that added together give a palindrome (36963).

The spelling of 3691845 in words is "three million, six hundred ninety-one thousand, eight hundred forty-five".