7940315838 has 96 divisors (see below), whose sum is σ = 20047547520. Its totient is φ = 2078032320.

The previous prime is 7940315837. The next prime is 7940315839. The reversal of 7940315838 is 8385130497.

It is an interprime number because it is at equal distance from previous prime (7940315837) and next prime (7940315839).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940315837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 492753 + ... + 508611.

It is an arithmetic number, because the mean of its divisors is an integer number (208828620).

Almost surely, 2^7940315838 is an apocalyptic number.

7940315838 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7940315838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10023773760).

7940315838 is an abundant number, since it is smaller than the sum of its proper divisors (12107231682).

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

7940315838 is a wasteful number, since it uses less digits than its factorization.

7940315838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16022 (or 16015 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 7940315838 is about 89108.4498686853. The cubic root of 7940315838 is about 1995.0138995646.

The spelling of 7940315838 in words is "seven billion, nine hundred forty million, three hundred fifteen thousand, eight hundred thirty-eight".