38121378140 has 24 divisors (see below), whose sum is σ = 80098314912. Its totient is φ = 15240280640.

The previous prime is 38121378121. The next prime is 38121378167. The reversal of 38121378140 is 4187312183.

It is a junction number, because it is equal to n+sod(n) for n = 38121378094 and 38121378103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479051 + ... + 552930.

It is an arithmetic number, because the mean of its divisors is an integer number (3337429788).

Almost surely, 2^38121378140 is an apocalyptic number.

It is an amenable number.

38121378140 is an abundant number, since it is smaller than the sum of its proper divisors (41976936772).

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

38121378140 is a wasteful number, since it uses less digits than its factorization.

38121378140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033837 (or 1033835 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 38121378140 in words is "thirty-eight billion, one hundred twenty-one million, three hundred seventy-eight thousand, one hundred forty".