4228768381 has 4 divisors (see below), whose sum is σ = 4250679292. Its totient is φ = 4206857472.

The previous prime is 4228768351. The next prime is 4228768409. The reversal of 4228768381 is 1838678224.

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 2739580281 + 1489188100 = 52341^2 + 38590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4228768381 is a prime.

It is a super-2 number, since 2×4228768381² = 35764964040290722322, 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 (4228768351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10955166 + ... + 10955551.

It is an arithmetic number, because the mean of its divisors is an integer number (1062669823).

Almost surely, 2^4228768381 is an apocalyptic number.

It is an amenable number.

4228768381 is a deficient number, since it is larger than the sum of its proper divisors (21910911).

4228768381 is a wasteful number, since it uses less digits than its factorization.

4228768381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21910910.

The product of its digits is 1032192, while the sum is 49.

The square root of 4228768381 is about 65028.9810853592. The cubic root of 4228768381 is about 1617.1040551381.

The spelling of 4228768381 in words is "four billion, two hundred twenty-eight million, seven hundred sixty-eight thousand, three hundred eighty-one".