4009768728 has 32 divisors (see below), whose sum is σ = 11456482560. Its totient is φ = 1145648160.

The previous prime is 4009768691. The next prime is 4009768739. The reversal of 4009768728 is 8278679004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11933668 + ... + 11934003.

It is an arithmetic number, because the mean of its divisors is an integer number (358015080).

Almost surely, 2^4009768728 is an apocalyptic number.

It is an amenable number.

4009768728 is an abundant number, since it is smaller than the sum of its proper divisors (7446713832).

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

4009768728 is a wasteful number, since it uses less digits than its factorization.

4009768728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23867687 (or 23867683 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 4009768728 is about 63322.7346851034. The cubic root of 4009768728 is about 1588.6922421894.

The spelling of 4009768728 in words is "four billion, nine million, seven hundred sixty-eight thousand, seven hundred twenty-eight".