4388381 has 2 divisors, whose sum is σ = 4388382. Its totient is φ = 4388380.

The previous prime is 4388359. The next prime is 4388387. The reversal of 4388381 is 1838834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3740356 + 648025 = 1934^2 + 805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4388381 is a prime.

It is a super-2 number, since 2×4388381² = 38515775602322, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4388387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2194190 + 2194191.

It is an arithmetic number, because the mean of its divisors is an integer number (2194191).

Almost surely, 2^4388381 is an apocalyptic number.

It is an amenable number.

4388381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4388381 is an equidigital number, since it uses as much as digits as its factorization.

4388381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 35.

The square root of 4388381 is about 2094.8462950775. The cubic root of 4388381 is about 163.7198891860.

The spelling of 4388381 in words is "four million, three hundred eighty-eight thousand, three hundred eighty-one".