4028687928 has 80 divisors (see below), whose sum is σ = 11293699560. Its totient is φ = 1341748800.

The previous prime is 4028687911. The next prime is 4028687939. The reversal of 4028687928 is 8297868204.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1126383 + ... + 1129953.

Almost surely, 2^4028687928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4028687928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5646849780).

4028687928 is an abundant number, since it is smaller than the sum of its proper divisors (7265011632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4028687928 is a wasteful number, since it uses less digits than its factorization.

4028687928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330 (or 5317 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 4028687928 is about 63471.9459919105. The cubic root of 4028687928 is about 1591.1869527946.

The spelling of 4028687928 in words is "four billion, twenty-eight million, six hundred eighty-seven thousand, nine hundred twenty-eight".