28345443750 has 480 divisors, whose sum is σ = 88135296480. Its totient is φ = 6765120000.

The previous prime is 28345443719. The next prime is 28345443769. The reversal of 28345443750 is 5734454382.

28345443750 is a `hidden beast` number, since 2 + 8 + 34 + 544 + 3 + 75 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28345443696 and 28345443705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 388293714 + ... + 388293786.

It is an arithmetic number, because the mean of its divisors is an integer number (183615201).

Almost surely, 2^28345443750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28345443750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44067648240).

28345443750 is an abundant number, since it is smaller than the sum of its proper divisors (59789852730).

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

28345443750 is an equidigital number, since it uses as much as digits as its factorization.

28345443750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 45.

The spelling of 28345443750 in words is "twenty-eight billion, three hundred forty-five million, four hundred forty-three thousand, seven hundred fifty".