38181818388 has 24 divisors (see below), whose sum is σ = 101818182592. Its totient is φ = 10909090944.

The previous prime is 38181818387. The next prime is 38181818407. The reversal of 38181818388 is 88381818183.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38181818387) 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 7 ways as a sum of consecutive naturals, for example, 227272645 + ... + 227272812.

Almost surely, 2^38181818388 is an apocalyptic number.

It is an amenable number.

38181818388 is an abundant number, since it is smaller than the sum of its proper divisors (63636364204).

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

38181818388 is a wasteful number, since it uses less digits than its factorization.

38181818388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454545471 (or 454545469 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 57.

The spelling of 38181818388 in words is "thirty-eight billion, one hundred eighty-one million, eight hundred eighteen thousand, three hundred eighty-eight".