4028868394 has 16 divisors (see below), whose sum is σ = 6134885640. Its totient is φ = 1983985920.

The previous prime is 4028868377. The next prime is 4028868397. The reversal of 4028868394 is 4938688204.

It can be written as a sum of positive squares in 4 ways, for example, as 1349460225 + 2679408169 = 36735^2 + 51763^2 .

It is not an unprimeable number, because it can be changed into a prime (4028868397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84054 + ... + 122974.

Almost surely, 2^4028868394 is an apocalyptic number.

4028868394 is a deficient number, since it is larger than the sum of its proper divisors (2106017246).

4028868394 is a wasteful number, since it uses less digits than its factorization.

4028868394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39705.

The product of its (nonzero) digits is 2654208, while the sum is 52.

The square root of 4028868394 is about 63473.3675961816. The cubic root of 4028868394 is about 1591.2107116347.

The spelling of 4028868394 in words is "four billion, twenty-eight million, eight hundred sixty-eight thousand, three hundred ninety-four".