7988402544 has 80 divisors (see below), whose sum is σ = 21879447840. Its totient is φ = 2502860800.

The previous prime is 7988402537. The next prime is 7988402549. The reversal of 7988402544 is 4452048897.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988402549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 654094 + ... + 666194.

It is an arithmetic number, because the mean of its divisors is an integer number (273493098).

Almost surely, 2^7988402544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7988402544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10939723920).

7988402544 is an abundant number, since it is smaller than the sum of its proper divisors (13891045296).

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

7988402544 is a wasteful number, since it uses less digits than its factorization.

7988402544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12938 (or 12932 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The square root of 7988402544 is about 89377.8638366346. The cubic root of 7988402544 is about 1999.0330779395.

The spelling of 7988402544 in words is "seven billion, nine hundred eighty-eight million, four hundred two thousand, five hundred forty-four".