4278394669 has 6 divisors (see below), whose sum is σ = 4312364334. Its totient is φ = 4244690520.

The previous prime is 4278394667. The next prime is 4278394733. The reversal of 4278394669 is 9664938724.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4277814025 + 580644 = 65405^2 + 762^2 .

It is not a de Polignac number, because 4278394669 - 2¹ = 4278394667 is a prime.

It is a super-2 number, since 2×4278394669² = 36609321887455239122, 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 (4278394667) 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 5 ways as a sum of consecutive naturals, for example, 116502 + ... + 148759.

It is an arithmetic number, because the mean of its divisors is an integer number (718727389).

Almost surely, 2^4278394669 is an apocalyptic number.

It is an amenable number.

4278394669 is a deficient number, since it is larger than the sum of its proper divisors (33969665).

4278394669 is an equidigital number, since it uses as much as digits as its factorization.

4278394669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265515 (or 265388 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 58.

The square root of 4278394669 is about 65409.4386843367. The cubic root of 4278394669 is about 1623.4052575860.

The spelling of 4278394669 in words is "four billion, two hundred seventy-eight million, three hundred ninety-four thousand, six hundred sixty-nine".