3648381 has 8 divisors (see below), whose sum is σ = 5306784. Its totient is φ = 2211120.

The previous prime is 3648343. The next prime is 3648391. The reversal of 3648381 is 1838463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3648381 - 2⁶ = 3648317 is a prime.

It is a super-2 number, since 2×3648381² = 26621367842322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 110557 = 3648381 / (3 + 6 + 4 + 8 + 3 + 8 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3648301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55246 + ... + 55311.

It is an arithmetic number, because the mean of its divisors is an integer number (663348).

Almost surely, 2^3648381 is an apocalyptic number.

It is an amenable number.

3648381 is a deficient number, since it is larger than the sum of its proper divisors (1658403).

3648381 is a wasteful number, since it uses less digits than its factorization.

3648381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110571.

The product of its digits is 13824, while the sum is 33.

The square root of 3648381 is about 1910.0735587930. The cubic root of 3648381 is about 153.9454042711.

The spelling of 3648381 in words is "three million, six hundred forty-eight thousand, three hundred eighty-one".