3644881 has 4 divisors (see below), whose sum is σ = 3654000. Its totient is φ = 3635764.

The previous prime is 3644873. The next prime is 3644899. The reversal of 3644881 is 1884463.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1884463 = 7 ⋅269209.

It is a cyclic number.

It is not a de Polignac number, because 3644881 - 2³ = 3644873 is a prime.

It is a super-2 number, since 2×3644881² = 26570315008322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644801) 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, 3931 + ... + 4768.

It is an arithmetic number, because the mean of its divisors is an integer number (913500).

Almost surely, 2^3644881 is an apocalyptic number.

It is an amenable number.

3644881 is a deficient number, since it is larger than the sum of its proper divisors (9119).

3644881 is an equidigital number, since it uses as much as digits as its factorization.

3644881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9118.

The product of its digits is 18432, while the sum is 34.

The square root of 3644881 is about 1909.1571438727. The cubic root of 3644881 is about 153.8961603914.

The spelling of 3644881 in words is "three million, six hundred forty-four thousand, eight hundred eighty-one".