28386750 has 64 divisors (see below), whose sum is σ = 80990208. Its totient is φ = 6487200.

The previous prime is 28386739. The next prime is 28386769. The reversal of 28386750 is 5768382.

It is a junction number, because it is equal to n+sod(n) for n = 28386699 and 28386708.

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, 2547 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (1265472).

Almost surely, 2^28386750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28386750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40495104).

28386750 is an abundant number, since it is smaller than the sum of its proper divisors (52603458).

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

28386750 is a wasteful number, since it uses less digits than its factorization.

28386750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5434 (or 5424 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28386750 is about 5327.9217336594. The cubic root of 28386750 is about 305.0506052375.

The spelling of 28386750 in words is "twenty-eight million, three hundred eighty-six thousand, seven hundred fifty".