3690891 has 12 divisors (see below), whose sum is σ = 5503680. Its totient is φ = 2381040.

The previous prime is 3690889. The next prime is 3690899. The reversal of 3690891 is 1980963.

It is not a de Polignac number, because 3690891 - 2¹ = 3690889 is a prime.

3690891 is a modest number, since divided by 891 gives 369 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3690899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6336 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (458640).

Almost surely, 2^3690891 is an apocalyptic number.

3690891 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3690891 is a deficient number, since it is larger than the sum of its proper divisors (1812789).

3690891 is a wasteful number, since it uses less digits than its factorization.

3690891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13266 (or 13263 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 3690891 is about 1921.1691752680. The cubic root of 3690891 is about 154.5410077466.

The spelling of 3690891 in words is "three million, six hundred ninety thousand, eight hundred ninety-one".