28148828640 has 192 divisors, whose sum is σ = 89743417344. Its totient is φ = 7415912448.

The previous prime is 28148828639. The next prime is 28148828651. The reversal of 28148828640 is 4682884182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16885087 + ... + 16886753.

It is an arithmetic number, because the mean of its divisors is an integer number (467413632).

Almost surely, 2^28148828640 is an apocalyptic number.

28148828640 is a gapful number since it is divisible by the number (20) 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 28148828640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44871708672).

28148828640 is an abundant number, since it is smaller than the sum of its proper divisors (61594588704).

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

28148828640 is a wasteful number, since it uses less digits than its factorization.

28148828640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089 (or 2081 counting only the distinct ones).

The product of its (nonzero) digits is 1572864, while the sum is 51.

The spelling of 28148828640 in words is "twenty-eight billion, one hundred forty-eight million, eight hundred twenty-eight thousand, six hundred forty".