8000381 has 4 divisors (see below), whose sum is σ = 8044764. Its totient is φ = 7956000.

The previous prime is 8000359. The next prime is 8000401. The reversal of 8000381 is 1830008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 525625 + 7474756 = 725^2 + 2734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8000381 is a prime.

It is a super-2 number, since 2×8000381² = 128012192290322, 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 (8000981) 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, 21920 + ... + 22281.

It is an arithmetic number, because the mean of its divisors is an integer number (2011191).

Almost surely, 2^8000381 is an apocalyptic number.

It is an amenable number.

8000381 is a deficient number, since it is larger than the sum of its proper divisors (44383).

8000381 is a wasteful number, since it uses less digits than its factorization.

8000381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44382.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 8000381 is about 2828.4944758652. The cubic root of 8000381 is about 200.0031749496.

Adding to 8000381 its reverse (1830008), we get a palindrome (9830389).

The spelling of 8000381 in words is "eight million, three hundred eighty-one", and thus it is an aban number.