4028312638 has 24 divisors (see below), whose sum is σ = 7036866144. Its totient is φ = 1724486400.

The previous prime is 4028312611. The next prime is 4028312663. The reversal of 4028312638 is 8362138204.

4028312638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 4028312597 and 4028312606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66718 + ... + 111838.

It is an arithmetic number, because the mean of its divisors is an integer number (293202756).

Almost surely, 2^4028312638 is an apocalyptic number.

4028312638 is a deficient number, since it is larger than the sum of its proper divisors (3008553506).

4028312638 is a wasteful number, since it uses less digits than its factorization.

4028312638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46048 (or 46041 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 4028312638 is about 63468.9895775882. The cubic root of 4028312638 is about 1591.1375425726.

The spelling of 4028312638 in words is "four billion, twenty-eight million, three hundred twelve thousand, six hundred thirty-eight".