3628381 has 4 divisors (see below), whose sum is σ = 3663712. Its totient is φ = 3593052.

The previous prime is 3628363. The next prime is 3628397. The reversal of 3628381 is 1838263.

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 not a de Polignac number, because 3628381 - 2¹⁹ = 3104093 is a prime.

It is a super-2 number, since 2×3628381² = 26330297362322, 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 (3628321) 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, 17511 + ... + 17716.

It is an arithmetic number, because the mean of its divisors is an integer number (915928).

Almost surely, 2^3628381 is an apocalyptic number.

It is an amenable number.

3628381 is a deficient number, since it is larger than the sum of its proper divisors (35331).

3628381 is a wasteful number, since it uses less digits than its factorization.

3628381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35330.

The product of its digits is 6912, while the sum is 31.

The square root of 3628381 is about 1904.8309636291. The cubic root of 3628381 is about 153.6635850793.

The spelling of 3628381 in words is "three million, six hundred twenty-eight thousand, three hundred eighty-one".