3648881 has 4 divisors (see below), whose sum is σ = 3807552. Its totient is φ = 3490212.

The previous prime is 3648859. The next prime is 3648899. The reversal of 3648881 is 1888463.

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 not a de Polignac number, because 3648881 - 2¹⁸ = 3386737 is a prime.

It is a super-2 number, since 2×3648881² = 26628665104322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3648581) 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, 79301 + ... + 79346.

It is an arithmetic number, because the mean of its divisors is an integer number (951888).

Almost surely, 2^3648881 is an apocalyptic number.

It is an amenable number.

3648881 is a deficient number, since it is larger than the sum of its proper divisors (158671).

3648881 is a wasteful number, since it uses less digits than its factorization.

3648881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158670.

The product of its digits is 36864, while the sum is 38.

The square root of 3648881 is about 1910.2044393206. The cubic root of 3648881 is about 153.9524365398.

The spelling of 3648881 in words is "three million, six hundred forty-eight thousand, eight hundred eighty-one".