3788687728 has 80 divisors (see below), whose sum is σ = 8969425920. Its totient is φ = 1513294848.

The previous prime is 3788687657. The next prime is 3788687737. The reversal of 3788687728 is 8277868873.

It is a self number, because there is not a number n which added to its sum of digits gives 3788687728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186453 + ... + 205771.

It is an arithmetic number, because the mean of its divisors is an integer number (112117824).

Almost surely, 2^3788687728 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 3788687728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4484712960).

3788687728 is an abundant number, since it is smaller than the sum of its proper divisors (5180738192).

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

3788687728 is a wasteful number, since it uses less digits than its factorization.

3788687728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19454 (or 19448 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 64.

The square root of 3788687728 is about 61552.3169994437. The cubic root of 3788687728 is about 1558.9407295058.

The spelling of 3788687728 in words is "three billion, seven hundred eighty-eight million, six hundred eighty-seven thousand, seven hundred twenty-eight".