7990543728 has 240 divisors, whose sum is σ = 25029085536. Its totient is φ = 2458460160.

The previous prime is 7990543723. The next prime is 7990543747. The reversal of 7990543728 is 8273450997.

7990543728 is a `hidden beast` number, since 7 + 9 + 90 + 543 + 7 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990543721) 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, 3501948 + ... + 3504228.

Almost surely, 2^7990543728 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 7990543728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12514542768).

7990543728 is an abundant number, since it is smaller than the sum of its proper divisors (17038541808).

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

7990543728 is a wasteful number, since it uses less digits than its factorization.

7990543728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374 (or 2356 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The square root of 7990543728 is about 89389.8413020182. The cubic root of 7990543728 is about 1999.2116666394.

The spelling of 7990543728 in words is "seven billion, nine hundred ninety million, five hundred forty-three thousand, seven hundred twenty-eight".