4478381 has 2 divisors, whose sum is σ = 4478382. Its totient is φ = 4478380.

The previous prime is 4478359. The next prime is 4478387. The reversal of 4478381 is 1838744.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3575881 + 902500 = 1891^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 4478381 - 2⁶ = 4478317 is a prime.

It is a super-2 number, since 2×4478381² = 40111792762322, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4478387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2239190 + 2239191.

It is an arithmetic number, because the mean of its divisors is an integer number (2239191).

Almost surely, 2^4478381 is an apocalyptic number.

It is an amenable number.

4478381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4478381 is an equidigital number, since it uses as much as digits as its factorization.

4478381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 35.

The square root of 4478381 is about 2116.2185614912. The cubic root of 4478381 is about 164.8315513827.

The spelling of 4478381 in words is "four million, four hundred seventy-eight thousand, three hundred eighty-one".