38778687784 has 16 divisors (see below), whose sum is σ = 72717354720. Its totient is φ = 19387393200.

The previous prime is 38778687781. The next prime is 38778687797. The reversal of 38778687784 is 48778687783.

It is not an unprimeable number, because it can be changed into a prime (38778687781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157554 + ... + 319969.

It is an arithmetic number, because the mean of its divisors is an integer number (4544834670).

Almost surely, 2^38778687784 is an apocalyptic number.

It is an amenable number.

38778687784 is a deficient number, since it is larger than the sum of its proper divisors (33938666936).

38778687784 is a wasteful number, since it uses less digits than its factorization.

38778687784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487680 (or 487676 counting only the distinct ones).

The product of its digits is 708083712, while the sum is 73.

Subtracting 38778687784 from its reverse (48778687783), we obtain a palindrome (9999999999).

The spelling of 38778687784 in words is "thirty-eight billion, seven hundred seventy-eight million, six hundred eighty-seven thousand, seven hundred eighty-four".