28680375 has 16 divisors (see below), whose sum is σ = 47724768. Its totient is φ = 15296000.

The previous prime is 28680373. The next prime is 28680383. The reversal of 28680375 is 57308682.

It is not a de Polignac number, because 28680375 - 2¹ = 28680373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28680371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37866 + ... + 38615.

It is an arithmetic number, because the mean of its divisors is an integer number (2982798).

Almost surely, 2^28680375 is an apocalyptic number.

28680375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28680375 is a deficient number, since it is larger than the sum of its proper divisors (19044393).

28680375 is an equidigital number, since it uses as much as digits as its factorization.

28680375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76499 (or 76489 counting only the distinct ones).

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

The square root of 28680375 is about 5355.4061470630. The cubic root of 28680375 is about 306.0987869352.

The spelling of 28680375 in words is "twenty-eight million, six hundred eighty thousand, three hundred seventy-five".