3648891 has 12 divisors (see below), whose sum is σ = 4970168. Its totient is φ = 2381184.

The previous prime is 3648859. The next prime is 3648899. The reversal of 3648891 is 1988463.

3648891 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 3648891 - 2⁵ = 3648859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3648899) 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, 8211 + ... + 8643.

Almost surely, 2^3648891 is an apocalyptic number.

3648891 is a deficient number, since it is larger than the sum of its proper divisors (1321277).

3648891 is an equidigital number, since it uses as much as digits as its factorization.

3648891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 489 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 3648891 is about 1910.2070568397. The cubic root of 3648891 is about 153.9525771786.

The spelling of 3648891 in words is "three million, six hundred forty-eight thousand, eight hundred ninety-one".