28680075 has 36 divisors (see below), whose sum is σ = 53283048. Its totient is φ = 15292800.

The previous prime is 28680073. The next prime is 28680083. The reversal of 28680075 is 57008682.

It is not a de Polignac number, because 28680075 - 2¹ = 28680073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28680073) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3715 + ... + 8435.

Almost surely, 2^28680075 is an apocalyptic number.

28680075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28680075 is a deficient number, since it is larger than the sum of its proper divisors (24602973).

28680075 is an equidigital number, since it uses as much as digits as its factorization.

28680075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746 (or 4729 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 28680075 is about 5355.3781379096. The cubic root of 28680075 is about 306.0977196554.

The spelling of 28680075 in words is "twenty-eight million, six hundred eighty thousand, seventy-five".