28019688840 has 384 divisors, whose sum is σ = 107274585600. Its totient is φ = 6253148160.

The previous prime is 28019688839. The next prime is 28019688859. The reversal of 28019688840 is 4888691082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 37013742 + ... + 37014498.

It is an arithmetic number, because the mean of its divisors is an integer number (279360900).

Almost surely, 2^28019688840 is an apocalyptic number.

28019688840 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 28019688840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53637292800).

28019688840 is an abundant number, since it is smaller than the sum of its proper divisors (79254896760).

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

28019688840 is a wasteful number, since it uses less digits than its factorization.

28019688840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The spelling of 28019688840 in words is "twenty-eight billion, nineteen million, six hundred eighty-eight thousand, eight hundred forty".