3918788140 has 24 divisors (see below), whose sum is σ = 8231237280. Its totient is φ = 1567175808.

The previous prime is 3918788123. The next prime is 3918788149. The reversal of 3918788140 is 418878193.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3918788149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86881 + ... + 124039.

It is an arithmetic number, because the mean of its divisors is an integer number (342968220).

Almost surely, 2^3918788140 is an apocalyptic number.

It is an amenable number.

3918788140 is an abundant number, since it is smaller than the sum of its proper divisors (4312449140).

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

3918788140 is a wasteful number, since it uses less digits than its factorization.

3918788140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42441 (or 42439 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 3918788140 is about 62600.2247599799. The cubic root of 3918788140 is about 1576.5845331653.

The spelling of 3918788140 in words is "three billion, nine hundred eighteen million, seven hundred eighty-eight thousand, one hundred forty".