28783750 has 20 divisors (see below), whose sum is σ = 53954604. Its totient is φ = 11513000.

The previous prime is 28783721. The next prime is 28783751. The reversal of 28783750 is 5738782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28783751) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 10264 + ... + 12763.

Almost surely, 2^28783750 is an apocalyptic number.

28783750 is a deficient number, since it is larger than the sum of its proper divisors (25170854).

28783750 is an equidigital number, since it uses as much as digits as its factorization.

28783750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23049 (or 23034 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28783750 is about 5365.0489280155. The cubic root of 28783750 is about 306.4661115173.

The spelling of 28783750 in words is "twenty-eight million, seven hundred eighty-three thousand, seven hundred fifty".