2643798528 has 300 divisors, whose sum is σ = 9186431562. Its totient is φ = 754790400.

The previous prime is 2643798527. The next prime is 2643798533. The reversal of 2643798528 is 8258973462.

2643798528 is a `hidden beast` number, since 2 + 6 + 43 + 79 + 8 + 528 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2642782464 + 1016064 = 51408^2 + 1008^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2643798527) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2031478 + ... + 2032778.

Almost surely, 2^2643798528 is an apocalyptic number.

2643798528 is a gapful number since it is divisible by the number (28) 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 2643798528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4593215781).

2643798528 is an abundant number, since it is smaller than the sum of its proper divisors (6542633034).

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

2643798528 is an equidigital number, since it uses as much as digits as its factorization.

2643798528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1313 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 2643798528 is about 51417.8814032628. The cubic root of 2643798528 is about 1382.7471928870.

The spelling of 2643798528 in words is "two billion, six hundred forty-three million, seven hundred ninety-eight thousand, five hundred twenty-eight".