3648869 has 4 divisors (see below), whose sum is σ = 4170144. Its totient is φ = 3127596.

The previous prime is 3648859. The next prime is 3648899. The reversal of 3648869 is 9688463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3648869 is a prime.

It is a super-2 number, since 2×3648869² = 26628489958322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3648859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260627 + ... + 260640.

It is an arithmetic number, because the mean of its divisors is an integer number (1042536).

Almost surely, 2^3648869 is an apocalyptic number.

It is an amenable number.

3648869 is a deficient number, since it is larger than the sum of its proper divisors (521275).

3648869 is an equidigital number, since it uses as much as digits as its factorization.

3648869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521274.

The product of its digits is 248832, while the sum is 44.

The square root of 3648869 is about 1910.2012982929. The cubic root of 3648869 is about 153.9522677729.

The spelling of 3648869 in words is "three million, six hundred forty-eight thousand, eight hundred sixty-nine".