7988463840 has 192 divisors, whose sum is σ = 28979596800. Its totient is φ = 1811896320.

The previous prime is 7988463827. The next prime is 7988463841. The reversal of 7988463840 is 483648897.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988463841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431086 + ... + 449234.

It is an arithmetic number, because the mean of its divisors is an integer number (150935400).

Almost surely, 2^7988463840 is an apocalyptic number.

7988463840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7988463840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14489798400).

7988463840 is an abundant number, since it is smaller than the sum of its proper divisors (20991132960).

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

7988463840 is a wasteful number, since it uses less digits than its factorization.

7988463840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18305 (or 18297 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The square root of 7988463840 is about 89378.2067396745. The cubic root of 7988463840 is about 1999.0381908691.

The spelling of 7988463840 in words is "seven billion, nine hundred eighty-eight million, four hundred sixty-three thousand, eight hundred forty".