28442757798 has 288 divisors, whose sum is σ = 80484348672. Its totient is φ = 7369315200.

The previous prime is 28442757793. The next prime is 28442757803. The reversal of 28442757798 is 89775724482.

It is an interprime number because it is at equal distance from previous prime (28442757793) and next prime (28442757803).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28442757793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 35070813 + ... + 35071623.

It is an arithmetic number, because the mean of its divisors is an integer number (279459544).

Almost surely, 2^28442757798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28442757798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40242174336).

28442757798 is an abundant number, since it is smaller than the sum of its proper divisors (52041590874).

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

28442757798 is a wasteful number, since it uses less digits than its factorization.

28442757798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 897 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 63.

It can be divided in two parts, 284427 and 57798, that added together give a square (342225 = 585²).

The spelling of 28442757798 in words is "twenty-eight billion, four hundred forty-two million, seven hundred fifty-seven thousand, seven hundred ninety-eight".