38778581384 has 16 divisors (see below), whose sum is σ = 72712209600. Its totient is φ = 19388658832.

The previous prime is 38778581383. The next prime is 38778581441. The reversal of 38778581384 is 48318587783.

It is a super-2 number, since 2×38778581384² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38778581383) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 275357 + ... + 391635.

It is an arithmetic number, because the mean of its divisors is an integer number (4544513100).

Almost surely, 2^38778581384 is an apocalyptic number.

It is an amenable number.

38778581384 is a deficient number, since it is larger than the sum of its proper divisors (33933628216).

38778581384 is a wasteful number, since it uses less digits than its factorization.

38778581384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157972 (or 157968 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 62.

The spelling of 38778581384 in words is "thirty-eight billion, seven hundred seventy-eight million, five hundred eighty-one thousand, three hundred eighty-four".