28303750 has 20 divisors (see below), whose sum is σ = 53054892. Its totient is φ = 11321000.

The previous prime is 28303741. The next prime is 28303753. The reversal of 28303750 is 5730382.

It is a super-2 number, since 2×28303750² = 1602204528125000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303753) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10072 + ... + 12571.

Almost surely, 2^28303750 is an apocalyptic number.

28303750 is a deficient number, since it is larger than the sum of its proper divisors (24751142).

28303750 is an equidigital number, since it uses as much as digits as its factorization.

28303750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22665 (or 22650 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 28303750 is about 5320.1268781863. The cubic root of 28303750 is about 304.7530025728.

The spelling of 28303750 in words is "twenty-eight million, three hundred three thousand, seven hundred fifty".