38778887740 has 24 divisors (see below), whose sum is σ = 81530064000. Its totient is φ = 15493574208.

The previous prime is 38778887717. The next prime is 38778887743. The reversal of 38778887740 is 4778887783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38778887743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1106115 + ... + 1140634.

It is an arithmetic number, because the mean of its divisors is an integer number (3397086000).

Almost surely, 2^38778887740 is an apocalyptic number.

It is an amenable number.

38778887740 is an abundant number, since it is smaller than the sum of its proper divisors (42751176260).

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

38778887740 is a wasteful number, since it uses less digits than its factorization.

38778887740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247621 (or 2247619 counting only the distinct ones).

The product of its (nonzero) digits is 118013952, while the sum is 67.

The spelling of 38778887740 in words is "thirty-eight billion, seven hundred seventy-eight million, eight hundred eighty-seven thousand, seven hundred forty".